Change GUI and GUI2 to be apps rather than core features

Change-Id: I862e5bdbccc29fd78716159e168e7a14bc5053e1
diff --git a/tools/test/cells/triple b/tools/test/cells/triple
index 4247122..2d882d9 100644
--- a/tools/test/cells/triple
+++ b/tools/test/cells/triple
@@ -6,4 +6,4 @@
 export OC3="192.168.56.104"
 export OCN="192.168.56.103"
 
-export ONOS_APPS="drivers,openflow,fwd,proxyarp,mobility"
+export ONOS_APPS="gui,drivers,openflow,fwd,proxyarp,mobility"