SAP OData 后台ETAG校验逻辑
CreatedbyJerryWang,lastmodifiedonJul27,2015修改了lead的数据之后点击savebutton，首先从后台重新读取一次lead的数据：!(https://userimages.g
SAP OData etag flag setting in metadata MPC_EXT
CreatedbyWang,Jerry,lastmodifiedonJan15,2015!(https://userimages.githubusercontent.com/5669954/41095039cd2e6130