* master: (363 commits)
  Added changelog item for issuable form dropdowns
  Add 'run tests' docs from GDK
  Bump gitlab_git to lazy load compare commits
  Add examples to repository files API (!5465)
  Ignore URLs starting with // (!5677)
  Add failing test for #7032
  Update timeago to shorter representation
  Add missing DOWNTIME constant to the AddTimestampsToMembersAgain migration
  Added guide about migrations and downtime
  Update CHANGELOG for 8.10.4
  Add a data migration to fix some missing timestamps in the members table (again)
  Move abilities by subject class to a dedicated method
  Remove unnecessary empty line after css var
  Set consistency in list text height css
  Add description to text/plain emails
  Fix Rename `add_users_into_project` and `projects_ids`
  fix spec
  Underscore variable to camelCase
  using shared path for project import uploads and refactored gitlab remove export worker
  Structure the development documentation
  ...

If you add another branch to gitlab-test that includes the word 'test',
browse_files.feature will fail with an ambiguous match.

1. Remove `Project#developers_can_push_to_protected_branch?` since it
   isn't used anymore.

2. Remove `Project#developers_can_merge_to_protected_branch?` since it
   isn't used anymore.

The issue was fixed in 2ba5e62. The spec is going in separately just
so the fix could go in as soon as possible.