VOL-3588 Update OFAgent to support new version of protos

Change-Id: Ic3944779f9a600ebcd5d7a916616f473059e311e
diff --git a/internal/pkg/openflow/parseGrpcReturn.go b/internal/pkg/openflow/parseGrpcReturn.go
index 8f67e06..d0c315a 100644
--- a/internal/pkg/openflow/parseGrpcReturn.go
+++ b/internal/pkg/openflow/parseGrpcReturn.go
@@ -22,9 +22,9 @@
 	"encoding/json"
 	"github.com/opencord/goloxi"
 	ofp "github.com/opencord/goloxi/of13"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
-	"github.com/opencord/voltha-protos/v3/go/openflow_13"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-protos/v4/go/openflow_13"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 )
 
 func parseOxm(ctx context.Context, ofbField *openflow_13.OfpOxmOfbField) goloxi.IOxm {