Removing calls to mock.assert_called_once_with (#3896)

If a mock's assert_called_once_with method is misspelled (e.g. asert_called_once_with) then the test will appear as passing.  Therefore, this commit removes all instances of assert_called_once_with calls and replaces them with two assertions:

        self.assertEqual(mock.call_count, 1)
        self.assertEqual(mock.call_args, mock.call(call_args))

tests/components/rollershutter/test_command_line.py

@@ -41,7 +41,10 @@ class TestCommandRollerShutter(unittest.TestCase):
             mock_run.return_value = b' foo bar '
             result = self.rs._query_state_value('runme')
             self.assertEqual('foo bar', result)
-            mock_run.assert_called_once_with('runme', shell=True)
+            self.assertEqual(mock_run.call_count, 1)
+            self.assertEqual(
+                mock_run.call_args, mock.call('runme', shell=True)
+            )
 
     def test_state_value(self):
         """Test with state value."""