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/adapters/common/core_proxy_test.go b/pkg/adapters/common/core_proxy_test.go
index 007fff4..97a88f5 100644
--- a/pkg/adapters/common/core_proxy_test.go
+++ b/pkg/adapters/common/core_proxy_test.go
@@ -19,11 +19,11 @@
 	"context"
 	"testing"
 
-	adapterIf "github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif"
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
-	mocks "github.com/opencord/voltha-lib-go/v3/pkg/mocks/kafka"
-	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
-	"github.com/opencord/voltha-protos/v3/go/voltha"
+	adapterIf "github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
+	mocks "github.com/opencord/voltha-lib-go/v4/pkg/mocks/kafka"
+	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"