[VOL-2310] Logging - Implement dynamic log levels in OpenOLT adapter

Working on Logging design changes.changes are added so how we can use voltha-lib-go to set dynamic logging configuration for component.

Change-Id: Iefd41bd23a84cee06735380837eea9054515ce80
diff --git a/VERSION b/VERSION
index b29ec1d..5aa7c52 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.9-dev
+2.3.9