Disable Sidekiq in merge immediately spec to prevent transient build failures
This should help prevent transient build failures, such as: https://gitlab.com/gitlab-org/gitlab-ce/builds/16439019
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This should help prevent transient build failures, such as: https://gitlab.com/gitlab-org/gitlab-ce/builds/16439019