gRPC migration

Change-Id: Ib390f6dde0d5a8d6db12ccd7da41135570ad1354
diff --git a/internal/bbsim/types/interfaces.go b/internal/bbsim/types/interfaces.go
index 946d507..ff6997e 100644
--- a/internal/bbsim/types/interfaces.go
+++ b/internal/bbsim/types/interfaces.go
@@ -17,7 +17,7 @@
 package types
 
 import (
-	"github.com/opencord/voltha-protos/v4/go/openolt"
+	"github.com/opencord/voltha-protos/v5/go/openolt"
 	"google.golang.org/grpc"
 )