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

Change-Id: I5dd2aa0072f631b3c47d35108f35ff9982aefe60
diff --git a/go.mod b/go.mod
index b506a7b..2adfb0f 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/jessevdk/go-flags v1.4.0
 	github.com/jhump/protoreflect v1.5.0
-	github.com/opencord/voltha-lib-go/v3 v3.0.23
+	github.com/opencord/voltha-lib-go/v3 v3.1.5
 	github.com/stretchr/testify v1.4.0
 	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 // indirect
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect