yohannmartineau - 2011-11-16

now using random sip ports in trunk. rtp random ports should also be used to ease automated tests.

For rtp random ports, a datagram socket with a random local port has to be instantiated before createSessionDescription invocation, then this random local port can be provided to createSessionDescription. Then the newly created datagram socket has to be provided to rtpSession. This datagram socket should probably be stored in media manager and referenced from invite handler.