Moving grafana-swarm port to 8883 as 8882 conflicts with envoy-swarm.

Change-Id: I519bfe120a7d7cc30100d7c5e99a3f6b6276656b
(cherry picked from commit e07fcf406fcc851ae9f64d4c0f1ed0a8bb518f6a)
diff --git a/compose/docker-compose-grafana-swarm.yml b/compose/docker-compose-grafana-swarm.yml
index e6cc564..f0da980 100644
--- a/compose/docker-compose-grafana-swarm.yml
+++ b/compose/docker-compose-grafana-swarm.yml
@@ -20,7 +20,7 @@
     networks:
       - voltha-net
     ports:
-    - "8882:80"
+    - "8883:80"
     - "2003:2003"
     - "2004:2004"
     - "8126:8126"