gRPC migration

Change-Id: Ib390f6dde0d5a8d6db12ccd7da41135570ad1354
diff --git a/internal/bbsim/devices/olt.go b/internal/bbsim/devices/olt.go
index 0f21845..6fb3226 100644
--- a/internal/bbsim/devices/olt.go
+++ b/internal/bbsim/devices/olt.go
@@ -28,16 +28,16 @@
 	"github.com/opencord/bbsim/internal/bbsim/responders/dhcp"
 	"github.com/opencord/bbsim/internal/bbsim/types"
 	omcilib "github.com/opencord/bbsim/internal/common/omci"
-	"github.com/opencord/voltha-protos/v4/go/ext/config"
+	"github.com/opencord/voltha-protos/v5/go/ext/config"
 
 	"github.com/google/gopacket"
 	"github.com/google/gopacket/layers"
 	"github.com/looplab/fsm"
 	"github.com/opencord/bbsim/internal/bbsim/packetHandlers"
 	"github.com/opencord/bbsim/internal/common"
-	common_protos "github.com/opencord/voltha-protos/v4/go/common"
-	"github.com/opencord/voltha-protos/v4/go/openolt"
-	"github.com/opencord/voltha-protos/v4/go/tech_profile"
+	common_protos "github.com/opencord/voltha-protos/v5/go/common"
+	"github.com/opencord/voltha-protos/v5/go/openolt"
+	"github.com/opencord/voltha-protos/v5/go/tech_profile"
 	log "github.com/sirupsen/logrus"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"