[FIX] Bug appeared when updating the same padron twice

1. The perception percentage was set to retention percentage of that vat

partner.py

@@ -59,7 +59,7 @@ class res_partner(models.Model):
             padron_percep = per_ids[0]
             res = {
                 'perception_id': percep_ids[0].id,
-                'percent': padron_percep.percentage_retention,
+                'percent': padron_percep.percentage_perception,
                 'multilateral': padron_percep.multilateral,
             }
         return res

wizard/padron_mass_update.py

@@ -150,12 +150,12 @@ class padron_mass_update(models.TransientModel):
 
         for res in cr.fetchall():
             partner_id = res[0]
+            partner = partner_obj.browse(partner_id)
             partner_perc = partner_perc_obj.search([('partner_id', '=', partner_id), ('perception_id', '=', perception_id)])
 
-            # Si no tiene la regla de res_partner_perception creada,
-            # la creamos
             vals = {}
             if not partner_perc:
+                # Si no tiene la regla de res_partner_perception creada la creamos
                 vals['perception_ids'] = [(0, 0, {'perception_id': perception_id, 'percent': res[1]})]
             # Si existe la regla pero difieren los porcentajes, actualizamos
             elif partner_perc.percent != res[1]:
@@ -166,7 +166,6 @@ class padron_mass_update(models.TransientModel):
             else:
                 vals['sit_iibb'] = '1'
 
-            partner = partner_obj.browse(res[0])
             partner.write(vals)
 
         # Ahora buscamos los que tienen una regla pero ya no estan en el padron