Merge branch 'feature/20210609-v2.0.34-购物车支持配送券ID1030707-周晓航'

shopping-cart-application-service/src/main/java/cn/freemud/adapter/CouponAdapter.java

@@ -573,7 +573,7 @@ public class CouponAdapter {
         if (CollectionUtils.isNotEmpty(couponPromotionVO.getCouponCodes())) {
             Set<String> collect = couponPromotionVO.getCouponCodes().stream().filter(s -> !"".equals(s)).collect(Collectors.toSet());
             if (CollectionUtils.isNotEmpty(collect)) {
-                couponPromotionVO.setCouponCodes(null);
+                couponPromotionVO.setCouponCodes(new HashSet<>());
             }
         }
         return couponPromotionVO;