Fix propagate service spec transient failure
Seen in https://gitlab.com/gitlab-org/gitlab-ce/builds/16902855
Port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1914 into master
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Seen in https://gitlab.com/gitlab-org/gitlab-ce/builds/16902855
Port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1914 into master