[VOL-3018] Disabling Persistence Volume Storage for Atomix
Adding documentation for ONOS cluster deployment.

Change-Id: Ib31a613a77ea1cbe578c82d3bb9732935cd6261f
diff --git a/minimal-values.yaml b/minimal-values.yaml
index 3eea594..1804096 100644
--- a/minimal-values.yaml
+++ b/minimal-values.yaml
@@ -126,6 +126,11 @@
   - name: ONOS_APPS
     value: "drivers,openflow-base,hostprovider"
 
+# No persistent volume in Atomix to have clean state for each re-deploy of ONOS
+atomix:
+  persistence:
+    enabled: false
+
 # Customization for BBSIM
 kafka_broker: 'voltha-kafka.voltha.svc.cluster.local:9092'
 pon: 1