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