Add test for backup/restore task
It would make sense to add separate test for backup / restore. See https://gitlab.com/gitlab-org/gitlab-ce/issues/25399#note_19655371.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
It would make sense to add separate test for backup / restore. See https://gitlab.com/gitlab-org/gitlab-ce/issues/25399#note_19655371.