VOL-3589 Update voltha go to support new version v4 of voltha protos

Change-Id: I32074b5c05b08f8ebd2205f8dc2af225bff465cc
diff --git a/rw_core/route/device_route_test.go b/rw_core/route/device_route_test.go
index 3857837..722c9f5 100644
--- a/rw_core/route/device_route_test.go
+++ b/rw_core/route/device_route_test.go
@@ -26,8 +26,8 @@
 	"testing"
 	"time"
 
-	"github.com/opencord/voltha-protos/v3/go/openflow_13"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	"github.com/opencord/voltha-protos/v4/go/openflow_13"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"github.com/stretchr/testify/assert"
 )