Upgrading to stc 2.3

Change-Id: Ie14c78625cbe0fd0ba926e848f3820221ab01fb3
diff --git a/tools/test/bin/stc b/tools/test/bin/stc
index d7ddc7c..cb5f32a 100755
--- a/tools/test/bin/stc
+++ b/tools/test/bin/stc
@@ -5,7 +5,7 @@
 
 . $ONOS_ROOT/tools/build/envDefaults
 
-VER=${STC_VERSION:-2.2}
+VER=${STC_VERSION:-2.3}
 JAR=~/.m2/repository/org/onosproject/onos-stc/$VER/onos-stc-$VER.jar
 SCENARIOS=$ONOS_ROOT/tools/test/scenarios