minor updates to mysql cleanup
Created by: bbodenmiller
- take -> make (from https://github.com/gitlabhq/gitlabhq/pull/7742#discussion_r18754673)
- correct incorrect details about when pool size was changed
/cc @dosire
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: bbodenmiller
/cc @dosire