updating voltha-lib-go for VOL-4994

Change-Id: I8bd2e59a5ec7cc05e143cfec7163aa0caf098475
diff --git a/vendor/modules.txt b/vendor/modules.txt
index a368f25..bda7c1d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -150,7 +150,7 @@
 github.com/opencord/omci-lib-go/v2
 github.com/opencord/omci-lib-go/v2/generated
 github.com/opencord/omci-lib-go/v2/meframe
-# github.com/opencord/voltha-lib-go/v7 v7.4.2
+# github.com/opencord/voltha-lib-go/v7 v7.4.3
 ## explicit
 github.com/opencord/voltha-lib-go/v7/pkg/config
 github.com/opencord/voltha-lib-go/v7/pkg/db