os.rename failed when it move the file across devices/mount-points.
shutil.move allow to rename/move a file from one physical device to
another.

This recipe was colliding with slapos.recipe.template
recipe.

Moreover, this is useless since slapos.recipe.template provide
the same functionality.

This reverts commit b86284e6.

This reverts commit 14bf54b1.

This is just a cosmetic commit, because shellinabox is redirecting
http url to https.

This leads to some bug, since cache-file is deleted
every buildout run.

This recipe was written in order to create a service which download a
file after the buildout run.

rootfs recipe is replaced by downloader recipe which is more generic.

Conflicts:
	component/libcap/buildout.cfg
	component/lxc/buildout.cfg

This is made to be compatible with modifications :
  - 377c6db729
  - a3370049ad
  - c26729e0425

This replace using slappartition name which is better.
Due to uuid4, collision probability is very low.