also str representation of unicode character is different.

/reviewed-on nexedi/erp5!1757

In nexedi/erp5@79fa584e we moved
some security definition from wendelin to erp5, but we didn't add any
tests anywhere. Recent project based tests revealed that this
migration actually failed [1]. We should therefore add a test for
this.

[1] nexedi/wendelin@f8678468 (comment 181134)

/reviewed-on nexedi/erp5!1757

This reduces dependency on DCWorkflow and cleanup StateChangeInfo monkey patch.

See merge request nexedi/erp5!1537

And the Product was removed in recent ERP5 SR.

This patch seems not needed

This is in SyncMLUtils

Now this is defined from new workflows, we no longer need the
DCWorkflow version

This was only useful during the transition to ERP5 Workflow, now
that workflows are migrated, Category API (setDestination) is more
natural, so there's no reason to keep this patch

Test setup monkey-patched some function which we removed when merging
Zope4 support. This function was used in translationContext, it was
working fine in the tests, because the function was here thanks to the
monkey-patch, but it failed with ImportError when used for real.

This fixes the import to use the real getRequest and drop the patch to
prevent similar problems.

According to https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000027804775/
ValidDate is the date when the transaction was validated ( "16. La date
de validation de l'écriture comptable"), this implementation was simply
returning the modification date, which was not always correct, for
example after causality state was recaculated.

This keeps the `getModificationDate` fallback for cases where FEC is
used with some non validated transactions, in order to keep compatibility

   On the implementation 0 dont set stop date on the Assignment