bringup tests

*Added dependency cob_safety_controller 
*Removes arg <machine..> https://github.com/ros-drivers/openni2_launch/commit/bbcf9f5451c2536736537e4d35bb1d1175065090

It is already in cob_substitute: https://github.com/ipa320/cob_substitute/tree/indigo_dev/cob_safety_controller