Merge branch 'unify-repository-controller' into 'master'

Move include SafeMirrorParams to EE module

See merge request gitlab-org/gitlab-ee!5631

app/controllers/projects/settings/repository_controller.rb

 module Projects
   module Settings
     class RepositoryController < Projects::ApplicationController
-      include SafeMirrorParams
-
       before_action :authorize_admin_project!
       before_action :remote_mirror, only: [:show]
 

ee/app/controllers/ee/projects/settings/repository_controller.rb

@@ -5,6 +5,8 @@ module EE
         extend ActiveSupport::Concern
 
         prepended do
+          include SafeMirrorParams
+
           before_action :push_rule, only: [:show]
         end