Switch to my sql

When I removed the workaround for http://fusesource.com/issues/browse/ENTESB-633 I ran into some derby exceptions regarding userName and password cannot be NULL. I tried various configurations but did not manage to get it resolved. 

eventually changed the datasource to use mysql ( based on tmielke https://github.com/tmielke/fuse-demos/tree/master/Camel/Camel-JMS-JDBC-XA-TX/datasource datasource example) and it seemed to work. 

Thanks Torsten for a great sample configuration.