发送新售后单消息时用错售后单创建时间字段

重新收到新售后单消息的处理的BUG修复。但当前京东订单不正常的收到重复售后单消息没有实际解决（比如订单：923795309000741，售后单：24078668）

business/jxcallback/orderman/order_afs.go

@@ -72,11 +72,13 @@ func (c *OrderManager) onAfsOrderNew(afsOrder *model.AfsOrder, orderStatus *mode
 		}
 	}
 	if existAfsOrder != nil {
+		// todo 可能导致状态回绕
 		existAfsOrder.Status = afsOrder.Status
 		existAfsOrder.VendorStatus = afsOrder.VendorStatus
 		if _, err = dao.UpdateEntity(db, existAfsOrder, "Status", "VendorStatus"); err != nil {
 			return err
 		}
+		afsOrder = existAfsOrder
 	} else {
 		// 全退都要先全删除再建
 		if afsOrder.RefundType == model.AfsTypeFullRefund {

business/jxutils/weixinmsg/weixinmsg.go

@@ -572,7 +572,7 @@ func NotifyAfsOrderStatus(afsOrder *model.AfsOrder) (err error) {
 			"color": WX_HIGHLEVEL_TEMPLATE_COLOR,
 		},
 		"keyword3": map[string]interface{}{
-			"value": utils.Time2Str(afsOrder.CreatedAt),
+			"value": utils.Time2Str(afsOrder.AfsCreatedAt),
 			"color": venderColors[order.VendorID],
 		},
 		"remark": map[string]interface{}{