AETHER-1798 Don't create Secret if no iCalUrl

Change-Id: I5fc366a2523485e4a76f9eb7e237e655f134290e
diff --git a/monitoring/edge-monitoring-server/templates/secret.yaml b/monitoring/edge-monitoring-server/templates/secret.yaml
index 046807d..dd7b91b 100644
--- a/monitoring/edge-monitoring-server/templates/secret.yaml
+++ b/monitoring/edge-monitoring-server/templates/secret.yaml
@@ -1,6 +1,7 @@
 # Copyright 2020-present Open Networking Foundation
 # SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
 
+{{- if .Values.iCalUrl }}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -10,4 +11,5 @@
 type: Opaque
 data:
   iCalUrl: |-
-    {{ .Values.iCalUrl | b64enc }}
\ No newline at end of file
+    {{ .Values.iCalUrl | b64enc }}
+{{- end }}