QPID-5282: Change IoSender to cause the socket to be closed after a sender timeout

IoSender#send now causes the socket to be closed in response to a sender timeout (in addition to the SenderException).
Note that this code path avoids the close causing the  sender thread join (as this would most likely timeout too). Also
improved log/exception messages to include the remote socket address (to aid problem diagnosis).

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1543721 13f79535-47bb-0310-9956-ffa450edef68