Fix spec in master
Fixes failed builds such as https://gitlab.com/gitlab-org/gitlab-ce/builds/3919501
cherry-picked from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6291
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes failed builds such as https://gitlab.com/gitlab-org/gitlab-ce/builds/3919501
cherry-picked from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6291