Remove VCR, webmock, other unnecessary gems and support

spec/vcr_cassettes/ssh-pull-project-denied.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-upload-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=2&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 200
-      message: OK
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:24:04 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
-      Vary:
-      - Origin
-      X-Frame-Options:
-      - SAMEORIGIN
-      X-Request-Id:
-      - 8ce54f29-9ed0-46e5-aedb-37edaa3d52da
-      X-Runtime:
-      - '0.228256'
-    body:
-      encoding: UTF-8
-      string: '{"status":false,"message":"Git access over SSH is not allowed"}'
-    http_version: 
-  recorded_at: Wed, 21 Jun 2017 12:24:04 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/ssh-push-disabled.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-receive-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=1&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 200
-      message: OK
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:23:57 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
-      Vary:
-      - Origin
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-      X-Request-Id:
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-      X-Runtime:
-      - '0.207159'
-    body:
-      encoding: UTF-8
-      string: '{"status":false,"message":"Git access over SSH is not allowed"}'
-    http_version: 
-  recorded_at: Wed, 21 Jun 2017 12:23:57 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/ssh-push-project-denied-401-text-html.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-receive-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=2&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 401
-      message: Unauthorized
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - text/html
-      Date:
-      - Wed, 21 Jun 2017 12:24:04 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
-      Vary:
-      - Origin
-      X-Frame-Options:
-      - SAMEORIGIN
-      X-Request-Id:
-      - c843a5a3-fc08-46eb-aa45-caceae515638
-      X-Runtime:
-      - '7.359835'
-    body:
-      encoding: UTF-8
-      string: '<p>Git access over SSH is not allowed</p>'
-    http_version:
-  recorded_at: Wed, 21 Jun 2017 12:24:04 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/ssh-push-project-denied-401-text-plain.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-receive-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=2&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 401
-      message: Unauthorized
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - text/plain
-      Date:
-      - Wed, 21 Jun 2017 12:24:04 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
-      Vary:
-      - Origin
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-      X-Runtime:
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-    body:
-      encoding: UTF-8
-      string: 'Git access over SSH is not allowed'
-    http_version:
-  recorded_at: Wed, 21 Jun 2017 12:24:04 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/ssh-push-project-denied-401.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-receive-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=2&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 401
-      message: Unauthorized
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:24:04 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
-      Vary:
-      - Origin
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-      - SAMEORIGIN
-      X-Request-Id:
-      - c843a5a3-fc08-46eb-aa45-caceae515638
-      X-Runtime:
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-    body:
-      encoding: UTF-8
-      string: '{"status":false,"message":"Git access over SSH is not allowed"}'
-    http_version:
-  recorded_at: Wed, 21 Jun 2017 12:24:04 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/ssh-push-project-denied.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/allowed
-    body:
-      encoding: US-ASCII
-      string: action=git-receive-pack&changes=0000000000000000000000000000000000000000+92d0970eefd7acb6d548878925ce2208cfe2d2ec+refs%2Fheads%2Fbranch4&gl_repository&project=gitlab-org%2Fgitlab-test.git&protocol=ssh&env=%7B%7D&key_id=2&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 200
-      message: OK
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '63'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:24:04 GMT
-      Etag:
-      - W/"76a32010244f80700d5e1ba8a55d094c"
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-      X-Request-Id:
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-      X-Runtime:
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-    body:
-      encoding: UTF-8
-      string: '{"status":false,"message":"Git access over SSH is not allowed"}'
-    http_version: 
-  recorded_at: Wed, 21 Jun 2017 12:24:04 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/two-factor-recovery-codes-fail.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/two_factor_recovery_codes
-    body:
-      encoding: US-ASCII
-      string: key_id=777&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 200
-      message: OK
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '58'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:33:42 GMT
-      Etag:
-      - W/"2642e3904bef8fa05ab8e0ca78c19047"
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-      X-Runtime:
-      - '0.196409'
-    body:
-      encoding: UTF-8
-      string: '{"success":false,"message":"Could not find the given key"}'
-    http_version: 
-  recorded_at: Wed, 21 Jun 2017 12:33:42 GMT
-recorded_with: VCR 2.4.0

spec/vcr_cassettes/two-factor-recovery-codes.yml

----
-http_interactions:
-- request:
-    method: post
-    uri: http://localhost:3000/api/v4/internal/two_factor_recovery_codes
-    body:
-      encoding: US-ASCII
-      string: key_id=1&secret_token=0a3938d9d95d807e94d937af3a4fbbea%0A
-    headers:
-      Accept-Encoding:
-      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
-      Accept:
-      - "*/*"
-      User-Agent:
-      - Ruby
-      Content-Type:
-      - application/x-www-form-urlencoded
-  response:
-    status:
-      code: 200
-      message: OK
-    headers:
-      Cache-Control:
-      - max-age=0, private, must-revalidate
-      Content-Length:
-      - '225'
-      Content-Type:
-      - application/json
-      Date:
-      - Wed, 21 Jun 2017 12:31:42 GMT
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-    body:
-      encoding: UTF-8
-      string: '{"success":true,"recovery_codes":["f67c514de60c4953","41278385fc00c1e0"]}'
-    http_version: 
-  recorded_at: Wed, 21 Jun 2017 12:31:42 GMT
-recorded_with: VCR 2.4.0