sgsn: Integrate VTY access into SGSN_Tests

Change-Id: I661963368a285ab9358d7f4845b42dc70c35a553
diff --git a/sgsn/SGSN_Tests.default b/sgsn/SGSN_Tests.default
index 6d8822b..256c9c9 100644
--- a/sgsn/SGSN_Tests.default
+++ b/sgsn/SGSN_Tests.default
@@ -4,7 +4,7 @@
 [TESTPORT_PARAMETERS]
 *.SGSNVTY.CTRL_MODE := "client"
 *.SGSNVTY.CTRL_HOSTNAME := "127.0.0.1"
-*.SGSNVTY.CTRL_PORTNUM := "4254"
+*.SGSNVTY.CTRL_PORTNUM := "4245"
 *.SGSNVTY.CTRL_LOGIN_SKIPPED := "yes"
 *.SGSNVTY.CTRL_DETECT_SERVER_DISCONNECTED := "yes"
 *.SGSNVTY.CTRL_READMODE := "buffered"