Option to use MySQL database instead of HSQLDB

[kevinjalbert]

Have an flag variable that the user sets to indicate they want to use a MySQL database oppose to the default HSQLDB.

If the flag is enabled then the hibernate.cfg.xml file in the Javalanche source must be adjusted (and must be able to revert from MySQL back to the default).

When using the MySQL option the user must assure that the require database and user access are setup, thus a test of the connection might be useful.