Update to omci-lib-go version 1.15.2

Change-Id: I383f643458f7edac5174408b5b3083afa6c584f6
diff --git a/VERSION b/VERSION
index 4b1cb82..a21ae4a 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.2.5-dev168
+1.2.5-dev169