Removing the openonu-py from the helm charts, increasing the of-agent version

Change-Id: Ia99c813d4e34b32e4a3325442cc6f0b9aa75ced1
diff --git a/voltha/values.yaml b/voltha/values.yaml
index 644bba3..82ad208 100644
--- a/voltha/values.yaml
+++ b/voltha/values.yaml
@@ -91,7 +91,7 @@
   ofagent:
     registry: '{{ .Values.global.image_registry }}'
     repository: '{{ .Values.global.image_org }}voltha-ofagent-go'
-    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.image_tag }}{{- else }}1.4.2{{- end }}{{- else }}1.4.2{{- end }}'
+    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.image_tag }}{{- else }}1.5.2{{- end }}{{- else }}1.5.2{{- end }}'
     pullPolicy: '{{ .Values.global.image_pullPolicy }}'
 
   rw_core: