The issues are found during the review of #68 - [x] https://github.com/ros-controls/ros2_control_demos/pull/68#discussion_r579692441 - [x] https://github.com/ros-controls/ros2_control_demos/pull/68#discussion_r579692520 - [x] https://github.com/ros-controls/ros2_control_demos/pull/68#discussion_r579692918 - [x] use "ros2_control" everywhere for the framework name. Check all copyright headers. (e.g. as [here](https://github.com/ros-controls/ros2_control_demos/pull/68#discussion_r579698707))