Add external database config to gitlab-monitor
When using an external database, configure gitlab-monitor to use it.
Fixes: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/2288
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
When using an external database, configure gitlab-monitor to use it.
Fixes: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/2288