Update controller param to the host IP

Change-Id: If550bcf9e85fa92f0847196d1e193b62b5cb34ab
diff --git a/compose/docker-compose-system-test.yml b/compose/docker-compose-system-test.yml
index a3e8ab1..89d1764 100644
--- a/compose/docker-compose-system-test.yml
+++ b/compose/docker-compose-system-test.yml
@@ -136,7 +136,7 @@
       "-v",
       "--consul=${DOCKER_HOST_IP}:8500",
       "--fluentd=fluentd:24224",
-      "--controller=localhost:6633",
+      "--controller=${DOCKER_HOST_IP}:6633",
       "--grpc-endpoint=@voltha-grpc",
       "--instance-id-is-container-name",
       "-v"