Merge branch 'project-push-rules-routes' into 'master'

Limit generated project push rule routes to one route that is really used

See merge request !1487

config/routes/project.rb

@@ -175,7 +175,7 @@ constraints(ProjectUrlConstrainer.new) do
           post :update_now
         end
       end
-      resources :push_rules, constraints: { id: /\d+/ }
+      resources :push_rules, constraints: { id: /\d+/ }, only: [:update]
       ## EE-specific
 
       resources :pipelines, only: [:index, :new, :create, :show] do