VOL-3588 Update OFAgent to support new version of protos

Change-Id: Ic3944779f9a600ebcd5d7a916616f473059e311e
diff --git a/internal/pkg/openflow/barrier.go b/internal/pkg/openflow/barrier.go
index 7c7bf5e..96b466a 100644
--- a/internal/pkg/openflow/barrier.go
+++ b/internal/pkg/openflow/barrier.go
@@ -20,7 +20,7 @@
 	"context"
 	"encoding/json"
 	ofp "github.com/opencord/goloxi/of13"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
 )
 
 func (ofc *OFConnection) handleBarrierRequest(ctx context.Context, request *ofp.BarrierRequest) {