[VOL-4635] openonuAdapterGo - default OMCI-timeout not sufficient in scale upgrade scenario

Change-Id: I260d876da2b87f1083b31ac35ec3ff5fd1df00da
diff --git a/voltha-adapter-openonu/values.yaml b/voltha-adapter-openonu/values.yaml
index 6c35d1b..374e857 100644
--- a/voltha-adapter-openonu/values.yaml
+++ b/voltha-adapter-openonu/values.yaml
@@ -33,7 +33,7 @@
   # timeout for ONU reconciling
   max_timeout_reconciling: "10s"
   # timeout for OMCI channel
-  omci_timeout: "1s"
+  omci_timeout: "3s"
   # timeout for RPC request
   rpc_timeout: "10s"
   # kv store timeout