AETHER-2234 move and update aether-roc-umbrella

Change-Id: I7ca845b92dff1fce5fd87d42053a43d80cc55f34
diff --git a/aether-roc-umbrella/templates/alertmanager-configmap.yaml b/aether-roc-umbrella/templates/alertmanager-configmap.yaml
new file mode 100644
index 0000000..cbbcfe3
--- /dev/null
+++ b/aether-roc-umbrella/templates/alertmanager-configmap.yaml
@@ -0,0 +1,24 @@
+# SPDX-FileCopyrightText: 2020-present Open Networking Foundation <info@opennetworking.org>
+#
+# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-alertmanager
+  namespace: {{ .Release.Namespace }}
+data:
+  alertmanager.yml: |-
+    global: {}
+      # slack_api_url: ''
+
+    receivers:
+      - name: default-receiver
+        webhook_configs:
+        - url: {{ .Values.prometheus.alertmanager.webhook_url }}
+
+    route:
+      group_wait: 10s
+      group_interval: 1m
+      receiver: default-receiver
+      repeat_interval: 3h