composer: make_roll: siwrl file in /home now go into a separate RPM

so now we have two rpms
1. with all the file in /home
2. with all the remainging files
composer: make_roll: remove useless if
composer: nice comment
composer: remove file from /tmp after the creation of the RPMs
composer: do not add the -home- RPM to the list of required RPMs

The -home- RPM will be installed only on the frontend so don't
put it in the list of the required RPM since those will go all
over the cluster
composer: first "almost working" version of the creation of roll

There are still several detail to be fixed but most of the files
are layed where they should be