Add explicit dependencies for types

mysql_grant has an autorequire()'d dependency on the .my.cnf file used
by the provider to talk to the database.

I've added this to mysql_database and mysql_user too since logically
these also need the file to be in place.

I've hit this bug because of a slightly unusual edge case in our own
manifests, but I think this fix belongs upstream regardless.
The old regex requires something after the 'host' part. Fix this.

Old regex is : /^GRANT\s(.+)\sON\s(.+)\sTO\s(.*)@(.*?)(\s.*)$/ . The
last part (\s.*)$ means "a space followed by anything". The issue is
that when user has no GRANT privileges, the "SHOW GRANTS FOR #{user_string}" returns
"GRANT SELECT ON `database`.* TO 'user'@'%'" which does not match (\s.*)$ .
This small patch fixes this making last bloc optional (thanks to '?').
Merge pull request #587 from maxenced/fix-mysql-grant-parsing

The old regex requires something after the 'host' part. Fix this.
Merge pull request #571 from jtopper/master

[MODULES-1333] Add explicit dependencies for mysql_database and mysql_user types