If we pass content_type parameter to the conversion tool,
it can find the appropriate Import Filter according content_type of document.
With this patch HTML => odt and XHTML => odt, are working without hackish code
in oood_commandtranforms.
Reviewed by romain


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@39027 20353a03-c40f-0410-a6d1-a30d3c3de9de