Clean up unit tests. (#78498)

test/units/errors/test_errors.py

@@ -37,12 +37,12 @@ class TestErrors(unittest.TestCase):
     def test_basic_error(self):
         e = AnsibleError(self.message)
         self.assertEqual(e.message, self.message)
-        self.assertEqual(e.__repr__(), self.message)
+        self.assertEqual(repr(e), self.message)
 
     def test_basic_unicode_error(self):
         e = AnsibleError(self.unicode_message)
         self.assertEqual(e.message, self.unicode_message)
-        self.assertEqual(e.__repr__(), self.unicode_message)
+        self.assertEqual(repr(e), self.unicode_message)
 
     @patch.object(AnsibleError, '_get_error_lines_from_file')
     def test_error_with_kv(self, mock_method):

test/units/executor/test_play_iterator.py

@@ -37,11 +37,11 @@ class TestPlayIterator(unittest.TestCase):
         hs.tasks_child_state = HostState(blocks=[0])
         hs.rescue_child_state = HostState(blocks=[1])
         hs.always_child_state = HostState(blocks=[2])
-        hs.__repr__()
+        repr(hs)
         hs.run_state = 100
-        hs.__repr__()
+        repr(hs)
         hs.fail_state = 15
-        hs.__repr__()
+        repr(hs)
 
         for i in range(0, 10):
             hs.cur_block = i