Multibuild can create generate a lots of checkout, especially for small
and fast jobs, which can overload runbot discs since we are trying not
to clean build immediatly. (To ease bug fix and allow wake up)
This commit proposes to store source on a single place, so that
docker can add them as ro volume in the build directory.
The checkout is also moved to the installs jobs, so that
builds containing only create builds steps won't checkout
the sources.
This change implies to use --addons-path correctly, since odoo
and enterprise addons wont be merged in the same repo anymore.
This will allow to test addons a dev will do, with a closer
command line.
This implies to change the code structure a litle, some changes
where made to remove no-so-usefull fields on build, and some
hard-coded logic (manifest_names and server_names) are now
stored on repo instead.
This changes implies that a build CANNOT write in his sources.
It shouldn't be the case, but it means that runbot cannot be
tested on runbot untill datas are written elsewhere than in static.
Other possibilities are possible, like bind mounting the sources
in the build directory instead of adding ro volumes in docker.
Unfortunately, this needs to give access to mount as sudo for
runbot user and changes docjker config to allow mounts
in volumes which is not the case by default. A plus of this
solution would be to be able to make an overlay mount.
