add missing cleanup step
Created by: bbodenmiller
Add step missed in https://github.com/gitlabhq/gitlabhq/commit/9a1dcf8d21e20b141b209f75db227dbfdf096bfc.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: bbodenmiller
Add step missed in https://github.com/gitlabhq/gitlabhq/commit/9a1dcf8d21e20b141b209f75db227dbfdf096bfc.