WIP: Fix mysql collation
Working to address https://github.com/gitlabhq/gitlabhq/pull/8041#issuecomment-61042627.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Working to address https://github.com/gitlabhq/gitlabhq/pull/8041#issuecomment-61042627.