ISPN-2883 + ISPN-2885 Various JMX and RHQ plugin fixes

ISPN-2883 Use special naming to overcome JMX method overloading with RHQ
operation name uniqueness
ISPN-2885 Expose parameter names in MBean metadata

https://issues.jboss.org/browse/ISPN-2885
https://issues.jboss.org/browse/ISPN-2883

Applies to both 5.2.x and master