[IMP] crm: call onchange partner when converting into opportunity

Before update

When we creating opportunity from lead and select option 'linked with existing
customer', partner information is not filled up in followup section.

After commit

When we creating opportunity from lead and select option 'linked with existing
customer', partner information is correctly filled up in followup section.

This commits fixes that behavior by calling onchange_partner_id when converting
a lead to an opportunity.

Task ID 1974504

closes odoo/odoo#33073

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/crm/models/crm_lead.py

@@ -855,23 +855,22 @@ class Lead(models.Model):
             :param customer : res.partner record
             :param team_id : identifier of the Sales Team to determine the stage
         """
-        if not team_id:
-            team_id = self.team_id.id if self.team_id else False
-        value = {
-            'planned_revenue': self.planned_revenue,
-            'probability': self.probability,
-            'name': self.name,
+        new_team_id = team_id if team_id else self.team_id.id
+        upd_values = {}
+        if customer:
+            upd_values.update(self._onchange_partner_id_values(customer and customer.id))
+        upd_values['email_from'] = upd_values['email_from'] if upd_values.get('email_from') else self.email_from
+        upd_values['phone'] = upd_values['phone'] if upd_values.get('phone') else self.phone
+        upd_values.update({
             'partner_id': customer.id if customer else False,
             'type': 'opportunity',
             'date_open': fields.Datetime.now(),
-            'email_from': customer and customer.email or self.email_from,
-            'phone': customer and customer.phone or self.phone,
             'date_conversion': fields.Datetime.now(),
-        }
+        })
         if not self.stage_id:
-            stage = self._stage_find(team_id=team_id)
-            value['stage_id'] = stage.id
-        return value
+            stage = self._stage_find(team_id=new_team_id)
+            upd_values['stage_id'] = stage.id
+        return upd_values
 
     def convert_opportunity(self, partner_id, user_ids=False, team_id=False):
         customer = False