hnbgw: tweak HNB name sent in HNBAP HNB Register

It helps when each distinct HNB has a different name showing in the
osmo-hnbgw.log.

Change-Id: I560415caba591a3f1139897c6ca4d31566f4c178
diff --git a/hnbgw/HNBGW_Tests.ttcn b/hnbgw/HNBGW_Tests.ttcn
index bf70003..d4f101b 100644
--- a/hnbgw/HNBGW_Tests.ttcn
+++ b/hnbgw/HNBGW_Tests.ttcn
@@ -717,7 +717,7 @@
 {
 	timer T := 2.0;
 
-	HNBAP[hnb_idx].send(ts_HNBAP_HNBRegisterRequest(char2oct("TTCN3 HNodeB"),
+	HNBAP[hnb_idx].send(ts_HNBAP_HNBRegisterRequest(char2oct("TTCN3-HNB-" & int2str(hnb_idx)),
 					'00F110'O,
 					int2bit(1 + cell_id, 28),
 					int2oct(2, 2),