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
fix cgi script showing table
use installonly for osp

full live features are already tested on the live images
use default desktop kde for uefi as lxde is not on promo