Update to omci-lib-go version 1.15.2

Change-Id: I383f643458f7edac5174408b5b3083afa6c584f6
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 5448a90..6a2dcc5 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -73,7 +73,7 @@
 github.com/mitchellh/go-homedir
 # github.com/mitchellh/mapstructure v1.1.2
 github.com/mitchellh/mapstructure
-# github.com/opencord/omci-lib-go v0.15.0
+# github.com/opencord/omci-lib-go v0.15.2
 github.com/opencord/omci-lib-go
 github.com/opencord/omci-lib-go/generated
 # github.com/opencord/voltha-lib-go/v4 v4.0.8