Moving BBSim to the latest protos

Change-Id: I797c3b3b6d964110b96f9636f941082ed14ad03d
diff --git a/internal/bbr/devices/olt.go b/internal/bbr/devices/olt.go
index 2a894b0..5e68fa3 100644
--- a/internal/bbr/devices/olt.go
+++ b/internal/bbr/devices/olt.go
@@ -25,7 +25,7 @@
 	"github.com/opencord/bbsim/internal/bbsim/devices"
 	"github.com/opencord/bbsim/internal/bbsim/packetHandlers"
 	"github.com/opencord/bbsim/internal/common"
-	"github.com/opencord/voltha-protos/go/openolt"
+	"github.com/opencord/voltha-protos/v2/go/openolt"
 	log "github.com/sirupsen/logrus"
 	"google.golang.org/grpc"
 	"io"