- Added one more flag to be ignored, because is not possible convert documents with this filters.
- refactor code to send the possible filters to unoconverter.py according to Document Type.
  i.e com.sun.star.text.GlobalDocument


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk/utils@41760 20353a03-c40f-0410-a6d1-a30d3c3de9de