Created by Jerry Wang, last modified on Jul 29, 2015
创建bindingContext：
SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 因为传入的oContext为空，所以oData肯定解析不出来。
SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 执行loadData重新从后台加载数据：
SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 oData返回：
SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 调用createBindingContext 传入的callback对新的context进行处理：
SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 SAP UI5 CreateBindingContext 方法的实现逻辑Created by Jerry Wang, last modified on Jul 29, 2015 
