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/SGSN_Components.ttcn b/pcu/SGSN_Components.ttcn
index ca1dec6..18f3992 100644
--- a/pcu/SGSN_Components.ttcn
+++ b/pcu/SGSN_Components.ttcn
@@ -101,6 +101,7 @@
 		connect(self:BSSGP_PROC[i], vc_BVC:BSSGP_PROC);
 		f_bssgp_client_register(mmctx.imsi, mmctx.tlli);
 	}
+	connect(self:BSSGP_GLOBAL[0], bssgp_component:GLOBAL);
 }
 
 /* Establish BSSGP connection to PCU */