MXBeans implementation

[adrian.brock]

I've prototyped an MXBean implementation in the MC-VDF-WORK
branch of head.

You can find it in mbeans/org/jboss/mx/mxbeans

This is not complete, see the javadoc in Java6 for the complete
mapping rules that need implementing:
http://download.java.net/jdk6/docs/api/javax/management/MXBean.html

Also, MXBeans are created in java6 via the StandardMBean api.