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

Change-Id: I32074b5c05b08f8ebd2205f8dc2af225bff465cc
diff --git a/rw_core/core/adapter/agent.go b/rw_core/core/adapter/agent.go
index 7189cff..f8ec23c 100644
--- a/rw_core/core/adapter/agent.go
+++ b/rw_core/core/adapter/agent.go
@@ -19,8 +19,8 @@
 import (
 	"context"
 	"github.com/golang/protobuf/ptypes"
-	"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/log"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"sync"
 	"time"
 )
diff --git a/rw_core/core/adapter/common.go b/rw_core/core/adapter/common.go
index 17de2ea..135aeec 100644
--- a/rw_core/core/adapter/common.go
+++ b/rw_core/core/adapter/common.go
@@ -18,7 +18,7 @@
 package adapter
 
 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/rw_core/core/adapter/manager.go b/rw_core/core/adapter/manager.go
index 5b582b5..38fe5bd 100644
--- a/rw_core/core/adapter/manager.go
+++ b/rw_core/core/adapter/manager.go
@@ -25,10 +25,10 @@
 	"github.com/gogo/protobuf/proto"
 	"github.com/golang/protobuf/ptypes/empty"
 	"github.com/opencord/voltha-go/db/model"
-	"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-protos/v3/go/voltha"
+	"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"
+	"github.com/opencord/voltha-protos/v4/go/voltha"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )