Use gitlab-shell 3.0.0
Update gitlab-shell to v3.0.0 as discussed in https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/59
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Update gitlab-shell to v3.0.0 as discussed in https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/59