Update simon's uk cells

Change-Id: Ia38870110491573920012bc5eb8a7ae3c2af77d0
diff --git a/tools/test/cells/simon-uk b/tools/test/cells/simon-uk
index d722ac5..fb8a0c4 100644
--- a/tools/test/cells/simon-uk
+++ b/tools/test/cells/simon-uk
@@ -40,7 +40,7 @@
 export ONOS_USER=sdn
 
 ## the apps we want activated at startup
-export ONOS_APPS="drivers,openflow,proxyarp,drivermatrix"
+export ONOS_APPS="drivers,openflow,proxyarp,drivermatrix,mlb"
 
 ## mininet VM
 export OCN="192.168.56.103"