initial sdcore-helm-charts update

Change-Id: I91788de083b0f906ce4b32ac226f616fb2647ef9
diff --git a/omec-control-plane/requirements.yaml b/omec-control-plane/requirements.yaml
new file mode 100644
index 0000000..49146fd
--- /dev/null
+++ b/omec-control-plane/requirements.yaml
@@ -0,0 +1,9 @@
+# Copyright 2019-present Open Networking Foundation
+#
+# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+
+dependencies:
+  - name: cassandra
+    version: 0.13.1
+    repository: https://charts.helm.sh/incubator
+    condition: cassandra.deploy