date value in getSpreadsheetsMapping, after changing code structure and also
add partial support for time value (there's no equivalent in ERP5, so the raw
string is returned).



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24599 20353a03-c40f-0410-a6d1-a30d3c3de9de