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/mocks/mockTechprofile.go b/mocks/mockTechprofile.go
index 6fa3c39..e4edf2f 100644
--- a/mocks/mockTechprofile.go
+++ b/mocks/mockTechprofile.go
@@ -18,10 +18,10 @@
 package mocks
 
 import (
-	"github.com/opencord/voltha-lib-go/v2/pkg/db"
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
-	tp "github.com/opencord/voltha-lib-go/v2/pkg/techprofile"
-	tp_pb "github.com/opencord/voltha-protos/v2/go/tech_profile"
+	"github.com/opencord/voltha-lib-go/v3/pkg/db"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	tp "github.com/opencord/voltha-lib-go/v3/pkg/techprofile"
+	tp_pb "github.com/opencord/voltha-protos/v3/go/tech_profile"
 )
 
 // MockTechProfile mock struct for OpenoltClient.