[VOL-2738]Enable configuration of etcd v3 client options

Change-Id: I5dd2aa0072f631b3c47d35108f35ff9982aefe60
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 6ed5711..45eeee3 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -90,7 +90,7 @@
 github.com/modern-go/concurrent
 # github.com/modern-go/reflect2 v1.0.1
 github.com/modern-go/reflect2
-# github.com/opencord/voltha-lib-go/v3 v3.0.23
+# github.com/opencord/voltha-lib-go/v3 v3.1.5
 github.com/opencord/voltha-lib-go/v3/pkg/config
 github.com/opencord/voltha-lib-go/v3/pkg/db
 github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore