* master: (34 commits)
  Add a lint check to restrict use of Rugged, EE version
  Fix EE offenses to the RSpec/SingleLineHook cop
  Update qa.rb
  Use flash message instead of regular text block
  Update common.rb
  Update gitlab-styles and re-enable the RSpec/SingleLineHook cop again
  Move EE-specific migrations under ee/db/
  Make Gitlab::Git::Repository#run_git private
  Update secret_values to support dynamic elements within parent
  Improve PostgreSQL warning message in Rake task
  Improve warning message about the replication status
  Add a warning for Postgresql < 9.6 when show replication status
  Refactored expand_section to use name instead of selector
  Refactored view/element definition to dry up
  add view/element, some small fixes and code refactor
  Small fixes and codestyle changes
  Reduced rename replication spec steps to the bare minimum.
  Dont send enter key
  Refactor to address codestyle feedback
  Make AdvancedSettings a Page and move `rename_to to it.
  ...