Updating tutorial assets to work with 1.13.1

Change-Id: Icfa6c0b9a35e869b68a7c1ff394144a3ba0256c4
diff --git a/tools/tutorials/vm/exportVM b/tools/tutorials/vm/exportVM
index 48420c9..792627c 100755
--- a/tools/tutorials/vm/exportVM
+++ b/tools/tutorials/vm/exportVM
@@ -3,7 +3,7 @@
 # Exports the ONOS Tutorial VM into an OVA file for publishing.
 # -----------------------------------------------------------------------------
 
-export VER=1.12.0
+export VER=1.13.1
 export OVA=/tmp/onos-tutorial-$VER.ova
 rm -f $OVA
 vboxmanage export "ONOS Tutorial" --output $OVA --manifest \