Revision 808890

resolve https://issues.apache.org/activemq/browse/AMQ-1855 - effects multicast discovery also; disposed is now atomic and the bridge.stop() waits for shutdown info to be sent before closing the transport, this will alleviate the InvalidClientIDException. bridges are now only remembered after they start which alleviates the retry problem with a failed bridge remaining, added test that exercises the code but which does not demonstrate the behavour on a dual core