[FIX] crm: recompute mail.alias defaults when *unsetting* use_leads on teams

Default mail.alias for crm.team are currently recomputed/modified
when *setting* use_leads on the team (type changes from opportunity to
leads), but not the other way around (*unsetting* use_leads doesn't
rollback type to opportunity).

Fix this issue.

Leaves over the issue that *disabling* the global setting doesn't
recompute aliases, which it probably should.

OPW-728690

addons/crm/models/crm_team.py

@@ -42,7 +42,7 @@ class Team(models.Model):
     @api.multi
     def write(self, vals):
         result = super(Team, self).write(vals)
-        if vals.get('use_leads') or vals.get('alias_defaults'):
+        if 'use_leads' in vals or 'alias_defaults' in vals:
             for team in self:
                 team.alias_id.write(team.get_alias_values())
         return result