Re-apply workaround for Kubernetes 1.6 auth
Re-apply workaround that got lost in https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1481
Fixes: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/2343
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Re-apply workaround that got lost in https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1481
Fixes: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/2343