* master: (154 commits)
  Don't disable the Rails mailer when seeding the test environment
  Documentation bug fixes: Added procedure to disable built-in Issues.
  Ensure `Namespace`'s is namespaced in `Gitlab::Kubernetes::Helm#initialize` and fix a transient failing spec due to that
  Add changelog entry
  Show only group name by default and put full namespace in tooltip
  Adds validation for Project#ci_config_path not to contain leading slash
  Gracefully handle case when repository's root ref does not exist
  Set EE variable
  issue note store
  allow caching options to be specified for counting services
  Update CHANGELOG.md for 10.2.3
  Add link to gitaly converation
  Fix pipeline config source specs and test it explicitly
  Set an artificial $HOME for gitaly in test
  Add a fixture file that uses seed-fu in the test env so that a borken seed-fu is detected
  Pin seed-fu to 2.3.6 since 2.3.7 is broken
  Do not set pipeline source after initialization
  updated diff spec
  fix for special charecter in file names
  We could simply count the commits
  ...