QPID-4558: Change C++ Selector implementation to use registered values
- Selectors should now implement every language feature of the
  registered apache selector filter extension to the amqp 1.0 spec.
- In the addressing syntax use a link property called just "selector"
- For amqp 1.0 on the wire use the registered filter descriptor code
  for the selector.
- For amqp 0-10 on the wire use a subscription property of "x-apache-selector"
  for the selector.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1458453 13f79535-47bb-0310-9956-ffa450edef68