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/config/logfeaturescontroller.go b/pkg/config/logfeaturescontroller.go
index f608e1e..353ae5c 100644
--- a/pkg/config/logfeaturescontroller.go
+++ b/pkg/config/logfeaturescontroller.go
@@ -19,7 +19,7 @@
 import (
 	"context"
 	"errors"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
 	"os"
 	"strings"
 )