update Discount

Author: wangzunjiao

ams-dotnet/src/com/alipay/ams/api/entities/Discount.cs

@@ -2,7 +2,9 @@ namespace com.alipay.ams.api.entities
 {
     public class Discount
     {
+        private string DiscountTag { get; set; }
         public string DiscountName { get; set; }
         public Amount SavingsAmount { get; set; }
+        private Amount EstimateSavingsAmount { get; set; }
     }
 }