VOL-629: Change name of consul service to 'vconsul'.

This avoids conflicts with other services named consul in some environments

Change-Id: If42119a57d01cf441df8e1ca92c1043923f59c03
diff --git a/compose/docker-compose-voltha-swarm.yml b/compose/docker-compose-voltha-swarm.yml
index cd6489a..00c5b73 100644
--- a/compose/docker-compose-voltha-swarm.yml
+++ b/compose/docker-compose-voltha-swarm.yml
@@ -12,7 +12,7 @@
     entrypoint:
       - voltha/voltha/main.py
       - -v
-      - --consul=consul:8500
+      - --consul=vconsul:8500
       - --fluentd=fluentd:24224
       - --kafka=kafka
       - --rest-port=8880