[FIX+IMP] mass_mailing_list_dynamic: tests, icons, filters... (#211)

* [FIX+IMP] mass_mailing_list_dynamic: tests, icons, filters...

* Brand new icon
* Added feature of loading an existing filter as criteria
* Tests as SavepointCase for optimizing times
* Tests in post-install for avoiding errors on res.partner not null constraints
  when several modules added them.
* Updated documentation.
* Fix mock in test for not commiting test data.

* [FIX] mass_mailing_list_dynamic: Wasn't able to create contacts in fully synced lists

Syncing context was being set in the wrong object. Added to test too.

* [FIX] mass_mailing_list_dynamic: Allow to write back vals from res.partner

Module mass_mailing_partner writes back certain values from partner to
mass_mailing_contact. Module should allow that write operation.

mass_mailing_partner/models/res_partner.py

@@ -55,7 +55,7 @@ class ResPartner(models.Model):
             if vals.get('name'):
                 mm_vals['name'] = vals['name']
             if vals.get('email'):
-                mm_vals['name'] = vals['email']
+                mm_vals['email'] = vals['email']
             # Using sudo because ACLs shouldn't produce data inconsistency
             self.env["mail.mass_mailing.contact"].sudo().search([
                 ("partner_id", "in", self.ids),