Update mailroom
Fixes #2698 (closed) and #2711 (closed).
cc @rspeicher #2698 (closed) is a bug with a new feature, so I think this should go in a patch release.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes #2698 (closed) and #2711 (closed).
cc @rspeicher #2698 (closed) is a bug with a new feature, so I think this should go in a patch release.