jicofo: fix rest bind in container (#1496)

jicofo/rootfs/defaults/jicofo.conf

@@ -145,7 +145,7 @@ jicofo {
 
     {{ if $ENABLE_REST }}
     rest {
-      host = "127.0.0.1"
+      host = "0.0.0.0"
     }
     {{ end }}