VOL-2258 release 2.2.2

Change-Id: Ia6b104c5794b373f294db7491ccbda428a454e23
diff --git a/go.mod b/go.mod
index dccec49..80430d5 100644
--- a/go.mod
+++ b/go.mod
@@ -10,5 +10,6 @@
 	github.com/opencord/voltha-lib-go/v2 v2.2.13
 	github.com/opencord/voltha-protos/v2 v2.0.1
 	go.etcd.io/etcd v0.0.0-20190930204107-236ac2a90522
+	google.golang.org/appengine v1.4.0 // indirect
 	google.golang.org/grpc v1.24.0
 )