fix #32: send java distribution to planet-lab hosts

Change-Id: I3a282336a8d1d5c984184bcb03af9923fd0f49f6
Reviewed-on: http://naan.mimuw.edu.pl:8001/106
Tested-by: Nebulostore Nebulostore <nebulostore@gmail.com>
Reviewed-by: Bolek Kulbabinski <bkulbabinski@gmail.com>