The edition of accounting categories are limited to accounting administrators.
If a product does not have an accounting category, the default value defined
on the configuration are used.
issue3805
review45111002
distutils import tests module from the source code, so we must force it to use
the test suite from the absolute path because it will be the converted on in
case of 2to3 otherwise we fall-back to the relative module.
issue3211
Because of the batch mode of Function field, the getter must not raise error
otherwise the error can be raised for a record that doesn't require the
account.
So we introduce an new kind of Function field which raise the error only at the
accessor level.
issue4087
review9531002
Cédric Krier