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/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 38a961b..bcefe67 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -226,7 +226,7 @@
 	/* wait for IPA RSL link to connect and send ID ACK */
 	T.start;
 	alt {
-	[] IPA_RSL[i].receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_ID_ACK}) {
+	[] IPA_RSL[i].receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_ID_ACK)) {
 		T.stop;
 		IPA_RSL[i].send(ts_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0,ts_RSL_PAGING_LOAD_IND(23)));
 		}
@@ -1707,7 +1707,7 @@
 	/* wait for IPA OML link to connect and then disconnect */
 	T.start;
 	alt {
-	[] IPA_RSL[0].receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_DOWN}) {
+	[] IPA_RSL[0].receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_DOWN)) {
 		T.stop;
 		return true;
 	}