Merge branch 'lleoni-fix-notify-post-receive'

See pull request https://github.com/gitlabhq/gitlabhq/pull/10429

changelogs/unreleased/fix-notify-post-receive.yml

+---
+title: Fixed wrong method call on notify_post_receive
+merge_request:
+author: Luigi Leoni

lib/api/internal.rb

@@ -140,7 +140,7 @@ module API
         begin
           Gitlab::GitalyClient::Notifications.new(project.repository).post_receive
         rescue GRPC::Unavailable => e
-          render_api_error(e, 500)
+          render_api_error!(e, 500)
         end
       end
     end