Minor fixes to grafana

Change-Id: I3143b4c699be949d4b0ed0b2d70446dac16e0360
diff --git a/compose/docker-compose-system-test.yml b/compose/docker-compose-system-test.yml
index 87d42ff..6cd3c48 100644
--- a/compose/docker-compose-system-test.yml
+++ b/compose/docker-compose-system-test.yml
@@ -107,7 +107,7 @@
       "/shovel/shovel/main.py",
       "--kafka=@kafka",
       "--consul=${DOCKER_HOST_IP}:8500",
-      "--topic=voltha.kpi",
+      "--topic=voltha.kpis",
       "--host=${DOCKER_HOST_IP}"
     ]
     depends_on: