[FIX] auth_signup: fix computation of default template user in settings

Indeed we store an integer that is the ID of the user to copy when
creating the portal user, not a boolean. We therefore have to evaluate
the result instead of comparing it to a boolean. This was introduced
at 689d6d6829.

addons/auth_signup/models/base_config_settings.py

@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+from ast import literal_eval
+
 from odoo import api, fields, models
 
 
@@ -22,7 +24,7 @@ class BaseConfigSettings(models.TransientModel):
         res.update(
             auth_signup_reset_password=get_param('auth_signup.reset_password', 'False').lower() == 'true',
             auth_signup_uninvited='b2c' if get_param('auth_signup.allow_uninvited', 'False').lower() == 'true' else 'b2b',
-            auth_signup_template_user_id=get_param('auth_signup.template_user_id', 'False').lower() == 'true',
+            auth_signup_template_user_id=literal_eval(get_param('auth_signup.template_user_id', 'False')),
         )
         return res