Change goloxi dependency to opencord/goloxi.

Remove explicit length calculation.

Change-Id: Ie3c7643ed0d1e076e85f050d2b3e354b77b9eb0f
diff --git a/internal/pkg/openflow/barrier.go b/internal/pkg/openflow/barrier.go
index 4775d2c..deba220 100644
--- a/internal/pkg/openflow/barrier.go
+++ b/internal/pkg/openflow/barrier.go
@@ -18,7 +18,7 @@
 
 import (
 	"encoding/json"
-	ofp "github.com/donNewtonAlpha/goloxi/of13"
+	ofp "github.com/opencord/goloxi/of13"
 	"github.com/opencord/voltha-lib-go/v3/pkg/log"
 )