msc: Add a test for LU with invalid MCC/MNC in BSSAP/RANAP

Verify that the MSC rejects a location update from a Cell/BSC that
contains a PLMN which does not match the core network's PLMN.

Related: OS#3162
Change-Id: I676894358259b9cc0f973769ce552ba58a2a58a1
2 files changed