L2SS-456: Use list assertion

tangostationcontrol/tangostationcontrol/integration_test/devices/base.py

@@ -60,7 +60,7 @@ class AbstractTestBases:
             """Test if any attributes are missing from opcua devices"""
 
             if isinstance(self.proxy, opcua_device):
-                self.assertEqual(len(self.proxy.opcua_missing_attributes_R), 0)
+                self.self.assertListEqual([], self.proxy.opcua_missing_attributes_R)
 
         def test_device_on(self):
             """Test if we can transition to on"""