Fix for [#20171205-E91759](https://nexedi.erp5.net/bug_module/20171205-E91759)

Basically extend the change from
24c836a7 to the case where there's an
exception, but the exception does not match and add tests to reproduce
the case.

/cc @seb @gabriel @georgios.dagkakis @Nicolas

/reviewed-on nexedi/erp5!630