[VOL-4025] Exposing event_topic in rw-core, openolt and openonu adapter charts
[VOL-4135] Exposing device-refresh-interval in ofAgent and defaulting to
15 seconds

Change-Id: I071944972a8deb3ad16fc9035538946b83c9fb30
diff --git a/voltha/values.yaml b/voltha/values.yaml
index c88888e..b185c16 100644
--- a/voltha/values.yaml
+++ b/voltha/values.yaml
@@ -84,9 +84,11 @@
   stack_id: "{{ .Values.global.stack_name }}"
   topics:
     core_topic: "{{ .Values.global.stack_name }}_rwcore"
+    event_topic: "voltha.events"
 
 ofagent:
   log_level: '{{ .Values.global.log_level }}'
+  device_refresh_interval: '15s'
 
 # Define Docker images to be used
 images: