QPID-4625: Extract amqp 1.0 application-properties from messages
- A working implementaion to qpid::amqp::Message::processProperties()
  so that qpid::broker::Message::getProperty() will work.
* This is used by the selector implementation.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1455579 13f79535-47bb-0310-9956-ffa450edef68