Ensure database usernames and database names are in back ticks #191

We had a build fail because the database / username had a hyphen. The task was:

TASK [database_backup/database_backup-mysql : Create/update mysql user for TCP connections.] ***

The error seemed to be caused by the lack of back-ticks around the longer db name with a hyphen in the queries, for example, this failed...

TRIGGER ON somedatabase_contact-us.*

...but this succeeded:

TRIGGER ON `somedatabase_contact-us`.*

We should check for / clean up queries like this.