sgsn: Fix default value for mp_ggsn_ip

Make it match the osmo-sgsn.cfg files present in the same directory.

Change-Id: I798b3c8b6e4a4787b8a9d5ecd9d2b1aad2b931ee
diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index 6c8ea61..e7abc9b 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -64,7 +64,7 @@
 	/* IP/port on which we run our internal GSUP/HLR emulation */
 	charstring mp_hlr_ip := "127.0.0.1";
 	integer mp_hlr_port := 4222;
-	charstring mp_ggsn_ip := "127.0.0.2";
+	charstring mp_ggsn_ip := "127.0.0.103";
 	integer mp_echo_interval := 5; /* in seconds. Only used in test enabling g_use_echo  */
 
 	NSConfigurations mp_nsconfig := {