bsc: replace octet string with decmatch when matching RR RELEASE

The 'decmatch' keyword allows us to match the decoded version of some
octetstring, which is very useful in the situations where we have
the L3 message only as octetstring but want to check if it matches
some L3 template.

Change-Id: I0a91e067f7e8062bf991fef8b0d4d8da740bfafc
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 5ac8191..555aac8 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -62,7 +62,6 @@
 const integer NUM_TCHH_PER_BTS := 2;
 const integer NUM_TCHF_PER_BTS := 4;
 const integer NUM_SDCCH_PER_BTS := 4;
-template octetstring t_l3_rr_chan_rel := '060D??*'O;
 
 
 /* per-BTS state which we keep */
@@ -872,7 +871,7 @@
 		got_deact_sacch := true;
 		repeat;
 	}
-	[] IPA_RSL[bts_nr].receive(tr_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0, tr_RSL_DATA_REQ(rsl_chan_nr, ?, t_l3_rr_chan_rel))) {
+	[] IPA_RSL[bts_nr].receive(tr_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0, tr_RSL_DATA_REQ(rsl_chan_nr, ?, decmatch tr_RRM_RR_RELEASE))) {
 		got_rr_chan_rel := true;
 		repeat;
 	}
@@ -2816,7 +2815,7 @@
 	[] RSL.receive(tr_RSL_DEACT_SACCH(g_chan_nr)) {
 			log("Got Deact SACCH");
 		}
-	[] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, t_l3_rr_chan_rel)) {
+	[] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, decmatch tr_RRM_RR_RELEASE)) {
 			log("Got RR Release");
 		}
 	[] RSL.receive(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)) {