msc: Don't require protocolExtensions in RANAP Paging

We were using '?' for the protocolExtensions in RANAP messages,
which required that such extensions existed.  In reality, we want
to use '*' which accepts paging messages whether or not there
are any protocolExtensions present.  As this is the default in
all our RANAP receive template, callers don't even need to specify
it.

This should fix all Iu paging related test failures in MSC_Tests*.ttcn

Change-Id: If22e16ecb301c86b9073ffde0af9e03bc85fbcc7
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 3a6711b..52aa685 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -2127,7 +2127,7 @@
 			setverdict(fail, "paging seems not to stop!");
 			mtc.stop;
 		}
-		[not pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi), ?)) {
+		[not pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi))) {
 			setverdict(fail, "paging seems not to stop!");
 			mtc.stop;
 		}
@@ -3070,7 +3070,7 @@
 	[pars.ran_is_geran] BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi)) {
 		setverdict(pass);
 		}
-	[not pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi), ?)) {
+	[not pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi))) {
 		setverdict(pass);
 		}
 	/* We don't expect anything else */
@@ -3677,7 +3677,7 @@
 	[g_pars.ran_is_geran] BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi)); {
 		setverdict(pass);
 		}
-	[not g_pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi), ?)) {
+	[not g_pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi))) {
 		setverdict(pass);
 		}
 	[] SGsAP.receive {