Commit
387b87d3975c566969d769f2a5404857a3b4c712
by Pau Espin PedrolRAN_Emulation: Support registering IuSigConId for connectionless RANAP messages
This allows dispatching received RANAP connectionless (UNITDATA)
messages which target potentially existing connections identified by
IuSigConId, like RANAP Reset Resource (Ack) messages.
Dispatching it to relevant ConnHdlrs allows explicitly waiting to
receive the message and answer from there.
Change-Id: I6a00a425ce52cb0c71b03b545207f27befa11a71