test(device): add test case for invalid run_async option

Author: guptadev21

tests/device_test.py

@@ -300,6 +300,12 @@ def test_execute_command_invalid_parameters(self):
                 'value': 'true',
                 'correct_value': False
             },
+            {
+                'response': 'Invalid run asynchronous option',
+                'key': 'run_async',
+                'value': 'true',
+                'correct_value': False
+            },
             {
                 'response': 'Invalid runas option',
                 'key': 'runas',