DMS was storing filename value in source_reference property, this will change, filename
will be used explicitely.

Warning: For consistency all variables or methods with id file_name or FileName
will be deprecated.
Methods will only receive filename as named argument and Filename as token in method name.
 - getPropertyDictFromFilename
 - getStandardFilename
 - ...




git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40963 20353a03-c40f-0410-a6d1-a30d3c3de9de