BSC_Tests: Migrate various ASSIGNMENT tests over to MSC_ConnHdlr

This way we benefit from the ability to handle the RR MODE MODIFY,
RSL MODE MODIFY, IPA CRCX and IPA MDCX capabilities of the MSC_ConnHdlr
component.  While each test case now needs a separate function in
addition to the actual testcase, this allows for more flexibility
and a more complete emulation of BTS behaviour.

Change-Id: Iba50663cb5104bf34bd6fc8aac2aa3b47155fe99
1 file changed