Moving BBSim to the latest protos

Change-Id: I797c3b3b6d964110b96f9636f941082ed14ad03d
diff --git a/go.mod b/go.mod
index 0e175f9..73e3a78 100644
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@
 	github.com/looplab/fsm v0.1.0
 	github.com/opencord/cordctl v0.0.0-20190909161711-01e9c1f04bf4
 	github.com/opencord/omci-sim v0.0.0-20191011202236-3687c57a7252
-	github.com/opencord/voltha-protos v0.0.0-20190813191205-792553b747df
+	github.com/opencord/voltha-protos/v2 v2.0.1
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/sirupsen/logrus v1.4.2
 	github.com/stretchr/testify v1.4.0 // indirect