EDGEPOD-35 Add Grafana dashboards for Aether

This patch introduces two new dashboards.
One is for monitoring overall resource usages and the other is for monitoring
Aether specific pods running in Edge.
Clusters are identified by "datacenter" external label.

Change-Id: I82fb2796fe54418a53817c70fcf20d1f61a4e059
diff --git a/nem-monitoring/templates/grafana-dashboard-configmap.yaml b/nem-monitoring/templates/grafana-dashboard-configmap.yaml
index c217d20..47382ed 100644
--- a/nem-monitoring/templates/grafana-dashboard-configmap.yaml
+++ b/nem-monitoring/templates/grafana-dashboard-configmap.yaml
@@ -48,3 +48,9 @@
   omec.json: |
 {{ .Files.Get "grafana-dashboards/omec.json" | indent 4 }}
 {{- end }}
+{{- if .Values.dashboards.aether }}
+  aether-clusters.json: |
+{{ .Files.Get "grafana-dashboards/aether-clusters.json" | indent 4 }}
+  aether-edge-pods.json: |
+{{ .Files.Get "grafana-dashboards/aether-edge-pods.json" | indent 4 }}
+{{- end }}