Reenable support for SSL and Plain on the same port (i.e. the transport sniffing).  Reenable all TLS tests

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/QPID-6262-JavaBrokerNIO@1644485 13f79535-47bb-0310-9956-ffa450edef68