QPID-6100: fix typo in exception message

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1643087 13f79535-47bb-0310-9956-ffa450edef68
QPID-6246: Various fixes for preferences provider UI

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1643103 13f79535-47bb-0310-9956-ffa450edef68
QPID-6258: [Java Broker] Remove SubFlushRunner leaving QueueRunner solely responsible for asynchronous message delivery

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1643197 13f79535-47bb-0310-9956-ffa450edef68