VOL-2189 update voltha-openolt-adapter to use voltha-protos=v2.0.1 and voltha-lib-go=v2.2.9;
Release v2.2.1

Change-Id: I527d6541f9d8b7df8504d886a01163c7e57bdd77
diff --git a/go.mod b/go.mod
index 8cf4b4b..c5e2ce0 100644
--- a/go.mod
+++ b/go.mod
@@ -7,8 +7,8 @@
 	github.com/golang/protobuf v1.3.2
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.5.0 // indirect
-	github.com/opencord/voltha-lib-go/v2 v2.2.8
-	github.com/opencord/voltha-protos v1.0.3
+	github.com/opencord/voltha-lib-go/v2 v2.2.9
+	github.com/opencord/voltha-protos/v2 v2.0.1
 	go.etcd.io/etcd v0.0.0-20190930204107-236ac2a90522
 	google.golang.org/grpc v1.24.0
 )