[IMP] lead: improve extensibility of partner create method

Before this commit _lead_create_contact actually constructed values AND
created the partner in one single step, making it difficult to override
in localizations that affect the partner model.

As containing method already existed, the partner creation was moved up
to this method, and the method was renamed to match with the file's
conventions. Now this method cleanly constructs the values.

Closes #16493 .

addons/crm/models/crm_lead.py

@@ -675,7 +675,7 @@ class Lead(models.Model):
         return True
 
     @api.multi
-    def _lead_create_contact(self, name, is_company, parent_id=False):
+    def _create_lead_partner_data(self, name, is_company, parent_id=False):
         """ extract data from lead to create a partner
             :param name : furtur name of the partner
             :param is_company : True if the partner is a company
@@ -683,7 +683,7 @@ class Lead(models.Model):
             :returns res.partner record
         """
         email_split = tools.email_split(self.email_from)
-        values = {
+        return {
             'name': name,
             'user_id': self.user_id.id,
             'comment': self.description,
@@ -705,30 +705,30 @@ class Lead(models.Model):
             'is_company': is_company,
             'type': 'contact'
         }
-        return self.env['res.partner'].create(values)
 
     @api.multi
     def _create_lead_partner(self):
         """ Create a partner from lead data
             :returns res.partner record
         """
+        Partner = self.env['res.partner']
         contact_name = self.contact_name
         if not contact_name:
-            contact_name = self.env['res.partner']._parse_partner_name(self.email_from)[0] if self.email_from else False
+            contact_name = Partner._parse_partner_name(self.email_from)[0] if self.email_from else False
 
         if self.partner_name:
-            partner_company = self._lead_create_contact(self.partner_name, True)
+            partner_company = Partner.create(self._create_lead_partner_data(self.partner_name, True))
         elif self.partner_id:
             partner_company = self.partner_id
         else:
             partner_company = None
 
         if contact_name:
-            return self._lead_create_contact(contact_name, False, partner_company.id if partner_company else False)
+            return Partner.create(self._create_lead_partner_data(contact_name, False, partner_company.id if partner_company else False))
 
         if partner_company:
             return partner_company
-        return self._lead_create_contact(self.name, False)
+        return Partner.create(self._create_lead_partner_data(self.name, False))
 
     @api.multi
     def handle_partner_assignation(self,  action='create', partner_id=False):