QPID-4937 : [Java Broker] separate virtualhosts into different types

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1494667 13f79535-47bb-0310-9956-ffa450edef68
QPID-4938: No longer build acl or ssl support as plugins
(also remove final references to dead watchdog plugin)

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1494697 13f79535-47bb-0310-9956-ffa450edef68