Check only that main formats are supported.

Legacy formats will be supported in near future by new daemon cloudooo with dedicated mimetypes.
Resurrect these tests when refactoring of cloudooo will be finished.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41906 20353a03-c40f-0410-a6d1-a30d3c3de9de