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/mocks/kafka/common.go b/pkg/mocks/kafka/common.go
index 07ac9ec..6bc3356 100644
--- a/pkg/mocks/kafka/common.go
+++ b/pkg/mocks/kafka/common.go
@@ -16,7 +16,7 @@
 package kafka
 
 import (
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
 )
 
 var logger log.CLogger
diff --git a/pkg/mocks/kafka/endpoint_manager.go b/pkg/mocks/kafka/endpoint_manager.go
index 8b8e7f6..68bdcab 100644
--- a/pkg/mocks/kafka/endpoint_manager.go
+++ b/pkg/mocks/kafka/endpoint_manager.go
@@ -18,7 +18,7 @@
 
 import (
 	"context"
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
 )
 
 type EndpointManager struct{}
diff --git a/pkg/mocks/kafka/kafka_client.go b/pkg/mocks/kafka/kafka_client.go
index 9d6f50c..268c571 100644
--- a/pkg/mocks/kafka/kafka_client.go
+++ b/pkg/mocks/kafka/kafka_client.go
@@ -21,9 +21,9 @@
 	"sync"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
-	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
diff --git a/pkg/mocks/kafka/kafka_client_test.go b/pkg/mocks/kafka/kafka_client_test.go
index 7753d66..8754313 100644
--- a/pkg/mocks/kafka/kafka_client_test.go
+++ b/pkg/mocks/kafka/kafka_client_test.go
@@ -18,8 +18,8 @@
 
 import (
 	"context"
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
-	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
+	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
diff --git a/pkg/mocks/kafka/kafka_inter_container_proxy.go b/pkg/mocks/kafka/kafka_inter_container_proxy.go
index b974a92..9bbdf3c 100644
--- a/pkg/mocks/kafka/kafka_inter_container_proxy.go
+++ b/pkg/mocks/kafka/kafka_inter_container_proxy.go
@@ -22,8 +22,8 @@
 	"github.com/gogo/protobuf/proto"
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/any"
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
-	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
+	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 )
 
 type InvokeRpcArgs struct {