VOL-3588 Update OFAgent to support new version of protos

Change-Id: Ic3944779f9a600ebcd5d7a916616f473059e311e
diff --git a/cmd/ofagent/main.go b/cmd/ofagent/main.go
index 6b6ca49..8a769be 100644
--- a/cmd/ofagent/main.go
+++ b/cmd/ofagent/main.go
@@ -21,11 +21,11 @@
 	"flag"
 	"fmt"
 	"github.com/opencord/ofagent-go/internal/pkg/ofagent"
-	conf "github.com/opencord/voltha-lib-go/v3/pkg/config"
-	"github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
-	"github.com/opencord/voltha-lib-go/v3/pkg/probe"
-	"github.com/opencord/voltha-lib-go/v3/pkg/version"
+	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
+	"github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/probe"
+	"github.com/opencord/voltha-lib-go/v4/pkg/version"
 	"os"
 	"time"
 )