Merge branch 'ci-commit-as-pipeline' into with-pipeline-view

* ci-commit-as-pipeline: (131 commits)
  Optimise Merge Request builds rendering
  Fix migrations on MySQL
  Update db/schema.rb
  Cleanup changes
  Cleanup required migrations
  Add indexes concurrently on PostgreSQL
  Fix CiStatus implementation and tests
  Fix group_member_spec to not leak information
  Fix doc for moving an issue
  Update tests for moving issues via API
  Tie example config to JIRA screenshot
  API: Ability to move an issue
  Added ability to add custom tags to transactions
  API: Avoid group leak while updating the group
  API: Return 404 if user does not have access to group
  Move 'New branch from issue' feature doc to web_editor.md
  Fix repository cache invalidation issue when project is recreated with an empty repo
  improve formatting
  Add `Gitlab.com?` method
  (doc) fix typo to ssh keys doc url
  ...

Conflicts:
	app/controllers/projects/pipelines_controller.rb
	app/helpers/ci_status_helper.rb
	app/helpers/gitlab_routing_helper.rb
	app/views/projects/ci/commits/_commit.html.haml
	app/views/projects/commit/_ci_commit.html.haml