AETHER-513 Add grafana-aether Helm chart

Change-Id: I54b208bbbc981d2bff252ce9586d716dafb053cc
diff --git a/monitoring/grafana-aether/templates/NOTES.txt b/monitoring/grafana-aether/templates/NOTES.txt
new file mode 100644
index 0000000..2c966b5
--- /dev/null
+++ b/monitoring/grafana-aether/templates/NOTES.txt
@@ -0,0 +1,10 @@
+{{/*
+Copyright 2020-present Open Networking Foundation
+SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+*/}}
+
+Thank you for installing {{ .Chart.Name }}.
+
+Your release is named {{ .Release.Name }}.
+
+This chart deploys Grafana and ConfigMaps to configure custom Aether dashboards.