[FIX] odoo_referral: Fix undeterministic crashing bug

The http request to odoo.com could lead to a timeout.

Avoid it in a testing environment, to avoid tests like
test_20_crawl_demo to crash.

closes odoo/odoo#48307

Taskid: 2222797
X-original-commit: 873699142f3427ecf486cf4319e158768a4e1336
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/odoo_referral/models/res_users.py

@@ -10,7 +10,7 @@ import threading
 from hashlib import sha1
 from werkzeug import url_encode
 
-from odoo import api, models
+from odoo import api, models, tools
 
 
 DEST_SERVER_URL = 'https://www.odoo.com'
@@ -22,6 +22,8 @@ class Users(models.Model):
 
     @api.model
     def get_referral_updates_count_for_current_user(self):
+        if tools.config.options['test_enable']:
+            return 0
         token = self.env.user._get_or_generate_referral_token()
         if not token:
             return 0