from the recruitment, not all created employees.
Before this merge, every created employee was broadcasted to all existing users
of the same company. However when creating a batch of employees, for example
when configuring an new openerp instance, this was creating a lot of noise
in the inboxes.
Now, only recruited employee have a welcome message.
bzr revid: tde@openerp.com-20140218162958-2rr967jh9zu2spwe