sunyu::update:fix bug about use month card

shopping-cart-application-service/src/main/java/cn/freemud/service/impl/mcoffee/calculation/CouponDiscountCalculation.java

@@ -159,7 +159,9 @@ public class CouponDiscountCalculation {
             //商品券商品
             if (StringUtils.isNotBlank(cartGoods.getCouponCode()) || discountMon != null) {
                 //先将商品券商品最终售价设置为 原价
-                cartGoods.setAmount(cartGoods.getOriginalAmount());
+                if (!StringUtils.equals("9999",cartGoods.getSkuId())){
+                    cartGoods.setAmount(cartGoods.getOriginalAmount());
+                }
                 List<ActivityCalculationDiscountResponseDto.CalculationDiscountResult.Goods.GoodsDiscount> discountsNew = goodsMap.get(cartGoods.getCartGoodsUid()).getDiscounts();
                 if (CollectionUtils.isNotEmpty(discountsNew)) {
                     log.info("couponDiscountCalculation:{}",discountsNew);