* 9-1-stable: (509 commits)
  Periodically clean up temporary upload files to recover storage space
  Add a name field to the group edit form
  Remove the User#is_admin? method
  Fix specs
  Enable RSpec/DescribeSymbol; update .rubocop_todo.yml
  Update rubocop-rspec 1.12.0 -> 1.15.0
  Rename displaying_blame to blame
  Actually include WaitForAjax!
  Don't show Copy contents button on Blame page
  alfredo review changes
  Give explicit height to SVG icons for Safari
  Update MR title change icon
  Put back usernames in activity and profile feed
  Wait for AJAX requests to complete so they don't blow up if they are only handled after DatabaseCleaner has already run
  Revert yarn.lock changes
  add CHANGELOG.md entry for !10522
  upgrade webpack-dev-server to fix issues with SockJS causing odd reload behavior in firefox
  upgrade webpack to v2.3.3 to resolve sourcemap issues
  Rever yarn.lock changes
  Revert yarn.lock file changes
  ...