fix(builder): ignore etcdctl stdout in cleanup script

Author: mboersma

builder/rootfs/bin/cleanup

@@ -4,6 +4,6 @@ export ETCD=${ETCD:-$HOST:4001}
 
 while true
 do
-    etcdctl -C $ETCD watch --recursive /deis/services
+    etcdctl -C $ETCD watch --recursive /deis/services > /dev/null
     /home/git/check-repos
 done