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
This might look a bit like copy+paste programming for our testcases.
However, we actually want the Iu related tests show up as separate
'testscase' in the TTCN-3 sense, so there's no way that's more elegant
than this :/
Change-Id: I3b56e17487c9df839e67ed390a1ff89979683e8e