Added sample test using headless sim This test runs the headless sim and checks whether the behaviour node for achilles is running.
Added sample test using headless sim
This test runs the headless sim and checks whether the behaviour node for achilles is running.

BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS