MySQL is started too late

You end up with errors like this:

```
----------
    State: - mysql_database
    Name:      wordpress_trunk
    Function:  present
        Result:    False
        Comment:   MySQL Error 2002: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
        Changes:   
----------
    State: - mysql_database
    Name:      wp_cli_test
    Function:  present
        Result:    False
        Comment:   MySQL Error 2002: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
        Changes:   
----------
    State: - mysql_grants
    Name:      wp-cli-tests-mysql
    Function:  present
        Result:    False
        Comment:   MySQL Error 2002: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
        Changes:   
----------
    State: - mysql_user
    Name:      wp_cli_test
    Function:  present
        Result:    False
        Comment:   MySQL Error 2002: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
        Changes:   
```