Adding tests for custom modified date field
Adding tests for custom modified date field

kchitalia/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS