Voltha helm optimizations

Change-Id: I25eca498cef603f3bb2dd978a1be00810728cd49
diff --git a/voltha/templates/netconf.yaml b/voltha/templates/netconf.yaml
index d05afa8..cacbf2e 100644
--- a/voltha/templates/netconf.yaml
+++ b/voltha/templates/netconf.yaml
@@ -33,7 +33,7 @@
   namespace: {{ .Values.global.namespace }}
   serviceAccountName: {{ .Values.global.namespace }}-serviceaccount
 spec:
-  replicas: 3
+  replicas: {{ .Values.replicas.netconf }}
   template:
     metadata:
       labels: