Revision 383815

- A bunch of JMX related tiding up.
  - Added a sendTextMessage() method to the DestinationView so that a JMX console can send a test message to a destination.
  - Renamed a few bean properties so that they would be more consistent:
      - use get*Counter for properties that keep incrementing
      - use get*QueueSize for poperties that repesenet the size of list in broker.
  - the gc() method on the broker is now the only one expose
  - the CachedMessageCount is not exposed anymore.