- check status in CancelPromotion.

- return more accurate error in user related funcs

business/jxstore/promotion/jd_promotion.go

@@ -555,6 +555,9 @@ func CancelJdPromotion(ctx *jxcontext.Context, promotionID int) (err error) {
 	if err = dao.GetEntity(db, promotion); err != nil {
 		return err
 	}
+	if promotion.Status != model.PromotionStatusRemoteCreated {
+		return errors.New("当前状态不能进行取消操作")
+	}
 	promotionHandler := getPromotionHander(promotion.Type)
 	if promotionHandler == nil {
 		return errors.New("非法的促销类型")