VOL-2834 Support to deploy multiple adapters

Generate a unique instance id for each replica of the open-onu-adapter and
pass it as a parameter.

Change-Id: I2011860aa9ca85f106704f3f12eecd5c2da1786f
diff --git a/voltha-adapter-openonu/values.yaml b/voltha-adapter-openonu/values.yaml
index e2acb98..0edccb2 100644
--- a/voltha-adapter-openonu/values.yaml
+++ b/voltha-adapter-openonu/values.yaml
@@ -49,7 +49,7 @@
   adapter_open_onu:
     registry: '{{ .Values.defaults.image_registry }}'
     repository: '{{ .Values.defaults.image_org }}voltha-openonu-adapter'
-    tag: '{{- if hasKey .Values.defaults "image_tag" }}{{- if .Values.defaults.image_tag }}{{ .Values.defaults.image_tag }}{{- else }}2.3.6{{- end }}{{- else }}2.3.6{{- end }}'
+    tag: '{{- if hasKey .Values.defaults "image_tag" }}{{- if .Values.defaults.image_tag }}{{ .Values.defaults.image_tag }}{{- else }}2.4.0{{- end }}{{- else }}2.4.0{{- end }}'
     pullPolicy: '{{ .Values.defaults.image_pullPolicy }}'
   adapter_open_onu_go:
     repository: '{{ .Values.defaults.image_org }}voltha-openonu-adapter-go'