Add 'repository' to path blacklist, fixes #4591

lib/gitlab/blacklist.rb

@@ -3,7 +3,7 @@ module Gitlab
     extend self
     def path
-      %w(admin dashboard groups help profile projects search public assets u s teams merge_requests issues users snippets services)
+      %w(admin dashboard groups help profile projects search public assets u s teams merge_requests issues users snippets services repository)
     end
   end
 end