VOL-3589 Update voltha go to support new version v4 of voltha protos

Change-Id: I32074b5c05b08f8ebd2205f8dc2af225bff465cc
diff --git a/rw_core/core/kafka.go b/rw_core/core/kafka.go
index 79f323b..f8a956d 100644
--- a/rw_core/core/kafka.go
+++ b/rw_core/core/kafka.go
@@ -23,9 +23,9 @@
 	"github.com/opencord/voltha-go/rw_core/core/adapter"
 	"github.com/opencord/voltha-go/rw_core/core/api"
 	"github.com/opencord/voltha-go/rw_core/core/device"
-	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
-	"github.com/opencord/voltha-lib-go/v3/pkg/probe"
+	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/probe"
 )
 
 // startKafkInterContainerProxy is responsible for starting the Kafka Interadapter Proxy