[FIX] base: _compute_commercial_partner

Before the fix:

*Scenario 1:

create company A as a res.partner

on company A, add an individual contact B

on individual B, add an individual contact C

on individual C, go in accounting tab, click on 'parent company' link, you arrive on company A

*Scenario 2:

create individual B

add a contact individual C on individual B

create company A

on individual B, select a parent company A

on individual C, go in accounting tab, click on 'parent company' link, you arrive on B

After the fix, on each scenario, you arrive on company A.

opw:706757

odoo/addons/base/res/res_partner.py

@@ -429,6 +429,7 @@ class Partner(models.Model, FormatAddress):
         sync_children = self.child_ids.filtered(lambda c: not c.is_company)
         for child in sync_children:
             child._commercial_sync_to_children()
+        sync_children._compute_commercial_partner()
         return sync_children.write(sync_vals)
 
     @api.multi
@@ -452,6 +453,10 @@ class Partner(models.Model, FormatAddress):
                 commercial_fields = self._commercial_fields()
                 if any(field in values for field in commercial_fields):
                     self._commercial_sync_to_children()
+            for child in self.child_ids.filtered(lambda c: not c.is_company):
+                if child.commercial_partner_id != self.commercial_partner_id :
+                    self._commercial_sync_to_children()
+                    break
             # 2b. Address fields: sync if address changed
             address_fields = self._address_fields()
             if any(field in values for field in address_fields):