Modify for etcd-cluster chart

Change-Id: Icb8877cfe8795269807a612938b71664acf7ee10
diff --git a/configs/seba-ponsim.yaml b/configs/seba-ponsim.yaml
index b7325e6..3d5e4c9 100644
--- a/configs/seba-ponsim.yaml
+++ b/configs/seba-ponsim.yaml
@@ -17,7 +17,6 @@
 # Use this file to deploy the service versions speecified in the Helm charts.
 
 # voltha
-etcd-operator:
-  etcdCluster:
-    size: 1
+etcd-cluster:
+  clusterSize: 1