Bumps gitlab shell version to 5.9.1
Bumps version because of https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/167
Edited by username-removed-117638
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Bumps version because of https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/167