Added Gitlab::Database.config
This is added mainly to clean up some code introduced in EE MR https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1283. This does not have to be picked into 9.0, instead it can go in a 9.0 patch release.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is added mainly to clean up some code introduced in EE MR https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1283. This does not have to be picked into 9.0, instead it can go in a 9.0 patch release.