Adding a dashboard for VOLTHA-2.x, disabled by default

Change-Id: Iaa41974a62cdeb112961aa048d2a93d19c82ed61
diff --git a/nem-monitoring/Chart.yaml b/nem-monitoring/Chart.yaml
index 8d128ed..e21e56a 100644
--- a/nem-monitoring/Chart.yaml
+++ b/nem-monitoring/Chart.yaml
@@ -18,4 +18,4 @@
 description: Time Series Storage and Dashboard for CORD
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 1.3.0
+version: 1.3.1