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

Change-Id: I6bce9eb07396fb84e6733beeb81341080243e7a5
diff --git a/internal/pkg/commands/flows.go b/internal/pkg/commands/flows.go
index 1e8ec62..0c94f96 100644
--- a/internal/pkg/commands/flows.go
+++ b/internal/pkg/commands/flows.go
@@ -20,8 +20,8 @@
 	"fmt"
 	"github.com/opencord/voltctl/pkg/format"
 	"github.com/opencord/voltctl/pkg/model"
-	"github.com/opencord/voltha-protos/v3/go/openflow_13"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	"github.com/opencord/voltha-protos/v4/go/openflow_13"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"sort"
 	"strings"
 )