Stop reading bytes from the wire once the transport is closed.  Also prevent further ByteBuffers being queued to be sent once the transport is closed too

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/QPID-6262-JavaBrokerNIO@1644128 13f79535-47bb-0310-9956-ffa450edef68