[camera] create new scene for each camera

- add scenes as underlay (not shown)
- add basics after creating scenes
- set viewport to camera
- do not create scene for external robot
- update objects' pose/orientation for each scene

fix #371
[test] update video_camera pgm images
[ros] test request manager init (log warning)
[light] workaround fix share energy

workaround Blender < 2.66 did not share light energy between scenes
[test] increase friction tolerance