Fix flaky test in test_trainer (#7689)

tests/test_trainer.py

@@ -195,6 +195,8 @@ class TrainerIntegrationTest(unittest.TestCase):
         args = TrainingArguments("./regression")
         dict1, dict2 = args.to_dict(), trainer.args.to_dict()
         for key in dict1.keys():
+            # Logging dir can be slightly different as they default to something with the time.
+            if key != "loggin_dir":
                 self.assertEqual(dict1[key], dict2[key])
 
     def test_reproducible_training(self):