ROS 2 port ros_tutorials, roscpp_tutorials, and rospy_tutorials?

[sloretz]

The packages ros_tutorials, roscpp_tutorials, and rospy_tutorials all have COLCON_IGNORE files in the ROS 2 branches. These have not been ported to ROS 2.

This is a ticket to decide if they should be ported, and if so how to go about it. The client library names are different in ROS 2 rclpy and rclcpp instead of rospy and roscpp, so at the very least they should be changed. It's possible that these already overlap with the ros2/examples repo.

[dirk-thomas]

In ROS 2 tutorial-like packages are in different repositories: ros2/demos / ros2/examples / ros2/tutorials. That is why the tutorial packages in this repo have not been ported.