[jsk_mbzirc_tasks] add rviz for task3 / fix namespaces of UAVs

[furushchev]

[jsk_mbzirc_tasks] add rviz for task3 / fix namespaces of UAVs

Description

• [x] [jsk_mbzirc_tasks/config/task3.rviz] add rviz config file for task3
• [x] [jsk_mbzirc_tasks/launch/jsk_mbzirc_task_3.launch] add launch file for task3 and split namespaces
• [x] Add model of box for re-locating objects (see Rule p.7)
• [x] fix: No camera image published on UAVs
  • This fix includes PR to upstream ( https://github.com/ros-simulation/gazebo_ros_pkgs/pull/460 )

    Screenshot