VOL-1596 Add Support for handling multicast groups in OpenOLT Adapter.
VOL-1595 Add Support for handling multicast flows in OpenOLT Adapter.

Depends voltha-protos from the patch below:
https://gerrit.opencord.org/#/c/16690/

Change-Id: I1cc9900bd6400bb31aed11beda674138838a21d2
diff --git a/config/config.go b/config/config.go
index babd8ea..b763621 100644
--- a/config/config.go
+++ b/config/config.go
@@ -20,7 +20,7 @@
 import (
 	"flag"
 	"fmt"
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
 	"os"
 	"time"
 )