4teamwork/opengever.core — pull request #503 by lukasgraf (2014-08-26 08:20:38+00:00)
Title: Fix setting default for `preserved_as_paper` for mails in upgrade step.

`preserved_as_paper` has a schema level default that causes
the check `hasattr(aq_base(mail), 'preserved_as_paper'` to be `True` even though
the mail doesn't have a value for that field. This caused the value
from the default value adapter (registry) not to be set.