increase hard disk size for btrfs to 20gb

btrfs fails if separate home is on and disk size is < ~16 GB.
fine tuning for Promo scheduling
install test only for raid, full for uefi
auto retry if child died

let's see if that gets us better results.
Javascript ordering and filtering in results
export RESCUECD=1 for rescue
also set noautologin for rescue
increase hard disk size for btrfscryptlvm
allow filtering for build
fix job grabbing in case of race
fix releasing job if worker dies early
a simple way that manage to user(ip) management, put the data in openqa.conf instead of hardcoded in openqa.pm
another attempt to retry if worker died
add match for open source press

- match the open source press dvd
- make biarch part of flavor instead of arch
- add test cases
schedule live also for promo and Addon
refactor job_delete a bit
adjust to new name of osp DVD
fix api of job_delete to return amount
export FLAVOR

needed for testing e.g. osp dvd
clone promo live for archs/uefi/usb