Using portal_transforms is not deterministic, because we don't have
direct chain from ods to text, so the conversion is two steps, either
ods=>html=>text or ods=>pdf=>text.

This caused problem with hash randomization, revealed by
testDeferredStyle.TestODSDeferredStyle.test_report_method_access_request
with PYTHONHASHSEED=538 on python2. When using PYTHONHASHSEED=0 , this
was using ods=>html=>text and the assertion from the test was OK, but
when using ods=>pdf=>text the test fails because the words are cut at
end of line.