support converting docy<-->docx , xlsy<-->xlsx, ppty<-->pptx .
The binary files which are needed for conversion are absent in
repository.
Binaries will be downloaded by slapos from
lab.nexedi.com/bk/DocumentServer.

writer_png_Export filter now works but draw_eps_Export and impress_eps_Export do not work.

also remove filters that now work from default black list.

also keep backward compatibility with a whitespace separated string that is provided by old ERP5 code.

that prevents detecting the end of unit test.

* use getDocumentProperties() and getUserDefinedProperties() instead of deprecated getDocumentInfo().
* use python3 syntaxes.

Fix issue to get mime type to ms.xlsx format. In this case, the format is splitted to try select a generic format

This script is copy/paste from erp5.git/product/ERP5Type/tests/backportUnittest.py. Then, I applied all changes from the same file to fix the issue.

This reverts commit da0b08a7.

This script is copy/paste from erp5.git/product/ERP5Type/tests/backportUnittest.py. Then, I applied all changes from the same file to fix the issue.

to support psutil-0.7.1.

Add ooo_disable_filter_name_list option to disable ooo filter. This is useful when you want to prevent unnecessary filters to be used.

also make it possible to specify LANG from the configuration file.