Port of 25226-realtime-pipelines-fe to EE
Port of 25226-realtime-pipelines-fe to EE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10878
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Port of 25226-realtime-pipelines-fe to EE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10878