sgsn+pcu: Port suspend/resume cases to new BSSGP_CT:GLOBAL port

For 12+ days, suspend/resume related SGSN + PCU TTCN3 tets have been failing.

It was the introduction of the BSSGP_CT:GLOBAL test port in
I40d973d80709f5d56f59247e8647b52754f09bc8 +
I805372f3024a0ec2491a24422e02c0bc6dc669d2 which caused the related PDUs
now to no longer show up where they used to.

Change-Id: I1977302fef4868dc1c330bc6f48f6a6608949393
Closes: OS#4902
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index dad0873..0c56348 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -327,7 +327,7 @@
 
 	T.start(2.0);
 	alt {
-	[] BSSGP_SIG[0].receive(tr_BSSGP_SUSPEND(tlli, mp_gb_cfg.bvc[0].cell_id.ra_id)) {
+	[] BSSGP_GLOBAL[0].receive(tr_BSSGP_SUSPEND(tlli, mp_gb_cfg.bvc[0].cell_id.ra_id)) {
 		setverdict(pass);
 		}
 	[] T.timeout {