Use voltha-protos version 4.0.2
Bump major version of voltha-lib-go to 4.0.0 as this change results
in incompatible API version compared to previous version

Change-Id: I1def58361fb1d85f07d6948ebf1ffb7a92eb0d4c
diff --git a/pkg/kafka/endpoint_manager.go b/pkg/kafka/endpoint_manager.go
index 266f6c1..796eb72 100644
--- a/pkg/kafka/endpoint_manager.go
+++ b/pkg/kafka/endpoint_manager.go
@@ -21,9 +21,9 @@
 	"github.com/buraksezer/consistent"
 	"github.com/cespare/xxhash"
 	"github.com/golang/protobuf/proto"
-	"github.com/opencord/voltha-lib-go/v3/pkg/db"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	"github.com/opencord/voltha-lib-go/v4/pkg/db"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"sync"