Change GUI and GUI2 to be apps rather than core features

Change-Id: I862e5bdbccc29fd78716159e168e7a14bc5053e1
diff --git a/tools/test/cells/office b/tools/test/cells/office
index 09405f3..1a03ee2 100644
--- a/tools/test/cells/office
+++ b/tools/test/cells/office
@@ -3,4 +3,4 @@
 export ONOS_NIC="10.1.10.*"
 export OC1="10.1.10.223"
 
-export ONOS_APPS="drivers,openflow,fwd,proxyarp,mobility"
+export ONOS_APPS="gui,drivers,openflow,fwd,proxyarp,mobility"