Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
I believe this merge request will fix both issues #879 (closed) and #498 (closed).
If a merge request was merged via the command line, the correct web hook was fired with the field object_attributes.action = "merge". However, if the merge request was merged via the web UI, the webhook would be fired with object_attributes.action = "open".