JIRA:QPID-5555 Get the QMF plugin working again. There was still a gotcha on the ExclusivityPolicy, which compiled OK but gave ClassCastExceptions. This commit sorts that problem and also tweaks the returned port to report the TCP based AMQP port not the WS one

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1571021 13f79535-47bb-0310-9956-ffa450edef68