VOL-2189 update voltha-go to use voltha-protos=v2.0.1 and voltha-lib-go=v2.2.9
Release 2.2.1

Change-Id: Ia46863b34c89b32aecdd3a5a8d6505de1b46cf9d
diff --git a/rw_core/graph/device_graph_test.go b/rw_core/graph/device_graph_test.go
index 7118817..cb777fb 100644
--- a/rw_core/graph/device_graph_test.go
+++ b/rw_core/graph/device_graph_test.go
@@ -18,8 +18,8 @@
 import (
 	"errors"
 	"fmt"
-	"github.com/opencord/voltha-protos/go/openflow_13"
-	"github.com/opencord/voltha-protos/go/voltha"
+	"github.com/opencord/voltha-protos/v2/go/openflow_13"
+	"github.com/opencord/voltha-protos/v2/go/voltha"
 	"github.com/stretchr/testify/assert"
 	"math/rand"
 	"strconv"