This is a feature related to portal_contribution, sometimes filename is replaced by value provided by
rewriteIngestionData type based method.
setFile should keep value provided by portal_contribution instead of reading it from file itself.
See special parameter set_filename__ in EPR5.Tool.ContributionTool



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28977 20353a03-c40f-0410-a6d1-a30d3c3de9de