VOL-2111 use voltha-lib-go

Change-Id: I307c3c5648476d9bdc2c855be7d59bd9264665bd
diff --git a/Gopkg.toml b/Gopkg.toml
index b400baf..e9b2c71 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -38,6 +38,10 @@
   name = "github.com/opencord/voltha-go"
 
 [[constraint]]
+  version = "2.2.2"
+  name = "github.com/opencord/voltha-lib-go"
+
+[[constraint]]
   version = "1.0.0"
   name = "github.com/opencord/voltha-protos"