Regression test for set_parameters with bad callback reference (#253)
Regression test for set_parameters with bad callback reference (#253)

* Add regression test for set_parameters with callback

* Make it like the parameter_events_async node to excercise the bad reference

* Create paramters_client_ in constructor of node subclass

Possible since https://github.com/ros2/rclcpp/pull/413

ros2/system_tests,ros2/system_tests