Pull ONOS from local Docker registry

Change-Id: I8f2b1c5c29aec1bec59fea41ca29dd61d1c2e16b
diff --git a/roles/onos-fabric-install/files/onos-fabric-docker-compose.yml b/roles/onos-fabric-install/files/onos-fabric-docker-compose.yml
index b29d116..b9bc37d 100644
--- a/roles/onos-fabric-install/files/onos-fabric-docker-compose.yml
+++ b/roles/onos-fabric-install/files/onos-fabric-docker-compose.yml
@@ -4,7 +4,7 @@
 services:
 
    xos-onos:
-      image: onosproject/onos:latest
+      image: docker-registry:5000/onosproject/onos:candidate
       ports:
        - "6653:6653"
        - "8101:8101"