VOL-539: Provide option to enable/disable TLS security between ofagent and ONOS

Change-Id: I0655a22d39d9b95d7558aea08f4cab719bd6eec0
diff --git a/compose/docker-compose-system-test.yml b/compose/docker-compose-system-test.yml
index e22ea0a..0ce7920 100644
--- a/compose/docker-compose-system-test.yml
+++ b/compose/docker-compose-system-test.yml
@@ -206,6 +206,9 @@
       "--controller=${DOCKER_HOST_IP}:6653",
       "--grpc-endpoint=@voltha-grpc",
       "--instance-id-is-container-name",
+      "--enable-tls",
+      "--key-file=/ofagent/pki/voltha.key",
+      "--cert-file=/ofagent/pki/voltha.crt",
       "-v"
     ]
     depends_on: