Update Aether config for Azure Central and MWC Edge

Change-Id: Id7865a62475b834fbe28997d414260eac88b9e5f
diff --git a/deployment-configs/aether/apps/production-cassandra-azure.yaml b/deployment-configs/aether/apps/production-cassandra-azure.yaml
new file mode 100644
index 0000000..9258e77
--- /dev/null
+++ b/deployment-configs/aether/apps/production-cassandra-azure.yaml
@@ -0,0 +1,11 @@
+fullnameOverride: "cassandra"
+image:
+  tag: "2.1.20"
+persistence:
+  enabled: true
+  storageClass: "hostpath"
+config:
+  cluster_size: 1
+  seed_size: 1
+  cluster_domain: "azure.central"
+  endpoint_snitch: "GossipingPropertyFileSnitch"