[FIX] tests: move enter test_mode in setUpClass

Before this commit, the registry was entering test_mode in setUp,
leading to a hole during the setUpClass with a registry not in test mode
at this moment.

closes odoo/odoo#122585

X-original-commit: 993e4d2f98b9982eb64123d6cd0de8cc3b2056f4
Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>

odoo/tests/common.py

@@ -1595,6 +1595,9 @@ class HttpCase(TransactionCase):
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
+        if cls.registry_test_mode:
+            cls.registry.enter_test_mode(cls.cr)
+            cls.addClassCleanup(cls.registry.leave_test_mode)
 
         ICP = cls.env['ir.config_parameter']
         ICP.set_param('web.base.url', cls.base_url())
@@ -1605,9 +1608,6 @@ class HttpCase(TransactionCase):
 
     def setUp(self):
         super().setUp()
-        if self.registry_test_mode:
-            self.registry.enter_test_mode(self.cr)
-            self.addCleanup(self.registry.leave_test_mode)
 
         self.xmlrpc_common = xmlrpclib.ServerProxy(self.xmlrpc_url + 'common', transport=Transport(self.cr))
         self.xmlrpc_db = xmlrpclib.ServerProxy(self.xmlrpc_url + 'db', transport=Transport(self.cr))