Fix failling spec/features/task_lists_spec.rb due to wrong login helpers
This was failing on master (e.g. https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/31176922)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This was failing on master (e.g. https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/31176922)