* master: (66 commits)
  fix confidential border issue as well as confidential styles leaking on new MR
  Migrate force push check to Gitaly
  Add option to disable project export on instance
  Better categorize test coverage results
  Add option to disable project export on instance - db changes
  Better caching and indexing of broadcast messages
  Include the `is_admin` field in the `GET /users/:id` API when current user is an admin
  Document rspec-retry and rspec-flaky
  Fix cop description
  Retrieve and sync flaky specs report from and to S3
  Use a new RspecFlakyListener to detect flaky specs
  Fix formatting of patch_versions.md [skip ci]
  Enable Timecop safe mode
  Show error message for API 500 error in tests, and
  Fix merge request diff deserialisation when too_large was absent
  Delete correct key from `session` after authenticating using U2F
  Bumps omniauth-ldap gem version to 2.0.4
  Pending delete projects no longer return 500 error in Admins projects view
  Do not run the `ee_compat_check` job for stableish branches
  Update gitlab.po: Missing 'r' in "Fouché" that comes from "Fourcher" verb.
  ...