library/IPA: use tr_ASP_IPA_EV instead of inline templates

This way we can easily add new parameters to ASP_IPA_Event.

Change-Id: Icc37286fcb4d43836d56a26424ecb9dcba58d1f1
diff --git a/library/GSUP_Emulation.ttcn b/library/GSUP_Emulation.ttcn
index 4a03359..51c158a 100644
--- a/library/GSUP_Emulation.ttcn
+++ b/library/GSUP_Emulation.ttcn
@@ -183,9 +183,9 @@
 
 		alt {
 
-		[] GSUP.receive(ASP_IPA_Event:{up_down:=ASP_IPA_EVENT_ID_ACK}) { repeat; }
-		[] GSUP.receive(ASP_IPA_Event:{up_down:=ASP_IPA_EVENT_UP}) { repeat; }
-		[] GSUP.receive(ASP_IPA_Event:{up_down:=ASP_IPA_EVENT_DOWN}) {
+		[] GSUP.receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_ID_ACK)) { repeat; }
+		[] GSUP.receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_UP)) { repeat; }
+		[] GSUP.receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_DOWN)) {
 			setverdict(fail, "GSUP Connection Lost");
 			mtc.stop;
 			}