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/adaptercore/openolt_test.go b/adaptercore/openolt_test.go
index 47e9ce3..aefd862 100644
--- a/adaptercore/openolt_test.go
+++ b/adaptercore/openolt_test.go
@@ -29,14 +29,14 @@
 	"sync"
 	"testing"
 
-	com "github.com/opencord/voltha-lib-go/v2/pkg/adapters/common"
-	fu "github.com/opencord/voltha-lib-go/v2/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v2/pkg/kafka"
+	com "github.com/opencord/voltha-lib-go/v3/pkg/adapters/common"
+	fu "github.com/opencord/voltha-lib-go/v3/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
 	"github.com/opencord/voltha-openolt-adapter/config"
-	ic "github.com/opencord/voltha-protos/v2/go/inter_container"
-	"github.com/opencord/voltha-protos/v2/go/openflow_13"
-	ofp "github.com/opencord/voltha-protos/v2/go/openflow_13"
-	"github.com/opencord/voltha-protos/v2/go/voltha"
+	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	"github.com/opencord/voltha-protos/v3/go/openflow_13"
+	ofp "github.com/opencord/voltha-protos/v3/go/openflow_13"
+	"github.com/opencord/voltha-protos/v3/go/voltha"
 )
 
 // mocks the OpenOLT struct.