MSC_ConnectionHandler: Use explicit AoIP flag

Most differences between sccplite and AoIP are visible during the
assignment. The current implementation checks for the presence of a CIC
in the ASSIGNMENT REQUEST in order to detect if the communication should
be modeled by AoIP or sccplite. This method is error prone and does not
work very well in situations where only signalling is used, because
there in sccplite and AoIP no CIC or AoIP trasp. identifier is present,
so there is nothing to check on. To resolve this we need an explicit way
to tell the MSC_ConnectionHandler that it has to behave like an AoIP MSC
or like an sccplite MSC.

- Add an aoip flag to TestHdlrParams
- Make sure BSC_Tests.ttcn sets the AoIP depending on mp_bssap_cfg.transport

Change-Id: I800249e783deb018d99e81d814843e0574a5c69b
Related: OS#3639
2 files changed