msc: Store CM2/CM3 in g_pars, so it can be modified

Change-Id: I726d851f45379b3efdb5ab62ea8f196cc0e41cc5
diff --git a/msc_tests/MSC_Tests.ttcn b/msc_tests/MSC_Tests.ttcn
index e336e9a..0acfdb2 100644
--- a/msc_tests/MSC_Tests.ttcn
+++ b/msc_tests/MSC_Tests.ttcn
@@ -308,7 +308,9 @@
 		sccp_addr_peer := g_sccp_addr_peer,
 		cell_id := valueof(ts_CellId_CGI('262'H, '042'H, 23, 42)),
 		imsi := f_gen_imsi('26242'H, imsi_suffix),
-		msisdn := f_gen_msisdn('491239999'H, imsi_suffix)
+		msisdn := f_gen_msisdn('491239999'H, imsi_suffix),
+		cm2 := valueof(ts_CM2_default),
+		cm3 := omit
 	};
 
 	vc_conn := BSC_ConnHdlr.create(id);