[IMP] base_tier_validation_forward: Change the use of the validated field to validation_status

TT56391

Author: victoralmau

base_tier_validation_forward/tests/test_tier_validation.py

@@ -131,4 +131,4 @@ def test_01_forward_tier(self):
         wizard.comment = "Forward tier is reviewed"
         wiz = wizard.save()
         wiz.add_comment()
-        self.assertTrue(record.validated)
+        self.assertEqual(record.validation_status, "validated")