VOL-3735 Retrieve port counters using the GetExtValue(SingleGetValue) rpc from the openolt adapter

Change-Id: I6bce9eb07396fb84e6733beeb81341080243e7a5
diff --git a/internal/pkg/commands/devicegroups.go b/internal/pkg/commands/devicegroups.go
index a17a5e5..05b681b 100644
--- a/internal/pkg/commands/devicegroups.go
+++ b/internal/pkg/commands/devicegroups.go
@@ -20,7 +20,7 @@
 	"github.com/golang/protobuf/ptypes/empty"
 	flags "github.com/jessevdk/go-flags"
 	"github.com/opencord/voltctl/pkg/format"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 )
 
 const (