feature(mon): Grafana env variables (user, password and URL)

Change-Id: I21f80fa81265bf02cf9e546e7ae669d71130dbef
Signed-off-by: bravof <fbravo@whitestack.com>
diff --git a/docker/MON/Dockerfile b/docker/MON/Dockerfile
index b6eff1b..9505034 100644
--- a/docker/MON/Dockerfile
+++ b/docker/MON/Dockerfile
@@ -84,6 +84,9 @@
 ENV OSMMON_COLLECTOR_INTERVAL 30
 ENV OSMMON_EVALUATOR_INTERVAL 30
 ENV OSMMON_PROMETHEUS_URL http://prometheus:9090
+ENV OSMMON_GRAFANA_URL http://grafana:3000
+ENV OSMMON_GRAFANA_USER admin
+ENV OSMMON_GRAFANA_PASSWORD admin
 
 EXPOSE 8000