VOL-3082: Update go mod to voltha-lib-go version 3.1.11

Change-Id: I1593e5750aa0773eb8440153134dfb6db29ab007
diff --git a/go.mod b/go.mod
index d2949dc..c4ab0b3 100755
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@
 	github.com/cenkalti/backoff/v3 v3.1.1
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/protobuf v1.3.2
-	github.com/opencord/voltha-lib-go/v3 v3.1.9
+	github.com/opencord/voltha-lib-go/v3 v3.1.11
 	github.com/opencord/voltha-protos/v3 v3.3.5
 	go.etcd.io/etcd v0.0.0-20190930204107-236ac2a90522
 	google.golang.org/grpc v1.25.1