Created by Jerry Wang, last modified on Jul 27, 2015
修改了lead的資料之後點選save button，首先從背景重新讀取一次lead的資料：
SAP OData 背景ETAG校驗邏輯Created by Jerry Wang, last modified on Jul 27, 2015 
SAP OData 背景ETAG校驗邏輯Created by Jerry Wang, last modified on Jul 27, 2015 SAP OData 背景ETAG校驗邏輯Created by Jerry Wang, last modified on Jul 27, 2015 SAP OData 背景ETAG校驗邏輯Created by Jerry Wang, last modified on Jul 27, 2015 SAP OData 背景ETAG校驗邏輯Created by Jerry Wang, last modified on Jul 27, 2015 
