hnbgw: Provide proper params to set StatsD local ip/port

The StatsD init() function parameter names were misleading
(prefixed "dst_" while they are actualy "local_" ones).
As a result, the hnbgw test was passing the wrong values to it.

Change-Id: I213173c99ec314c2eebfb8836c4d3467b3a7f818
diff --git a/library/StatsD_Checker.ttcn b/library/StatsD_Checker.ttcn
index 8ace150..2ad4c9f 100644
--- a/library/StatsD_Checker.ttcn
+++ b/library/StatsD_Checker.ttcn
@@ -245,11 +245,11 @@
 	return seen_all;
 }
 
-function f_init_statsd(charstring id, inout StatsD_Checker_CT vc_STATSD, charstring dst_addr, integer dst_port) {
+function f_init_statsd(charstring id, inout StatsD_Checker_CT vc_STATSD, charstring local_addr, integer local_port) {
 	id := id & "-STATS";
 
 	vc_STATSD := StatsD_Checker_CT.create(id);
-	vc_STATSD.start(StatsD_Checker.main(dst_addr, dst_port));
+	vc_STATSD.start(StatsD_Checker.main(local_addr, local_port));
 }