Merge branch 'master' into artifacts-from-ref-and-build-name

* master: (335 commits)
  Disable transaction when adding index for Ci::Pipeline
  added changelog
  allow empty repos on import/export
  Modify test for Build tabs
  Add tests to project builds for pending tab
  Remove unused .js-running-count class
  Add test for new pending tab and update tests for running tab
  Add Pending Tab to Admin Builds
  added changelog
  limit project expor retry to only 3
  use method in validates statement
  Fix spec to set import_url before attempting to create import_data
  Allow a project import URL to be blank to prevent false positives preventing settings from being saved
  Refactor gitlab_ci_yaml_processor variables tests
  Fix CI yaml example
  Align cancel and retry buttons
  Remove deploy to production button
  Remove irrelevant comments
  Fix gitlab_ci_yaml_processor_spec.rb
  Fix AddWhenAndYamlVariablesToCiBuilds migration
  ...