Adding topology auto-layout.

Change-Id: I2b9e0b5808b8d193e8d08b7fe6ffdb007b083809
diff --git a/modules.defs b/modules.defs
index 481fe94..be9555f 100644
--- a/modules.defs
+++ b/modules.defs
@@ -241,6 +241,7 @@
     '//apps/rabbitmq:onos-apps-rabbitmq-oar',
     '//apps/odtn:onos-apps-odtn-oar',
     '//apps/mcast:onos-apps-mcast-oar',
+    '//apps/layout:onos-apps-layout-oar',
 ]
 
 PROTOCOL_APPS = [