PGW_Tests: update default values for mp_pgw_hostname/mp_pcrf_local_ip

The old values are not valid anymore when running against open5gs
version 2.4.2.  Most likely, the default addresses got changed
during the PGW split-up (now it's open5gs-smfd and open5gs-upfd).

Change-Id: I3dd7d1f0d4aebb94b8859e8d12e952917de35071
Related: SYS#5602
diff --git a/pgw/PGW_Tests.ttcn b/pgw/PGW_Tests.ttcn
index f026e58..c526fa2 100644
--- a/pgw/PGW_Tests.ttcn
+++ b/pgw/PGW_Tests.ttcn
@@ -19,14 +19,14 @@
 
 
 modulepar {
-	charstring mp_pgw_hostname := "127.0.0.3";
+	charstring mp_pgw_hostname := "127.0.0.4";
 	charstring mp_local_hostname_c := "127.0.0.1";
 	charstring mp_local_hostname_u := "127.0.0.1";
 
 	charstring mp_run_prog_as_user := "laforge";
 	charstring mp_ping_hostname := "10.45.0.1";
 
-	charstring mp_pcrf_local_ip := "127.0.0.5";
+	charstring mp_pcrf_local_ip := "127.0.0.9";
 	integer mp_pcrf_local_port := 3868;
 }