clarify that 'template1=#' is part of prompt
Similar to https://github.com/gitlabhq/gitlabhq/blob/master/doc/install/database_mysql.md clarify that template1=# is part of the prompt.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Similar to https://github.com/gitlabhq/gitlabhq/blob/master/doc/install/database_mysql.md clarify that template1=# is part of the prompt.