gbproxy: Enable IP-SNS towards SGSN

Change-Id: Ia9cb646d57cd3bf77aebf60318e5f76599d516a5
diff --git a/gbproxy/GBProxy_Tests.cfg b/gbproxy/GBProxy_Tests.cfg
index 638946c..0e442d1 100644
--- a/gbproxy/GBProxy_Tests.cfg
+++ b/gbproxy/GBProxy_Tests.cfg
@@ -14,7 +14,7 @@
 [MODULE_PARAMETERS]
 GBProxy_Tests.mp_nsconfig_sgsn := {
 	{
-		handle_sns := false
+		handle_sns := true
 	}
 }