systemd: remove upstream renamed old service files
kernel-modules: move usb-storage out of fixed drivers
dracut.sh: Add --noimageifnotneeded parameter

Do not create an image in host-only mode, if no kernel driver is needed
and no $initdir/etc/cmdline/*.conf is generated.
shutdown/shutdown.sh: mount --move all basic mounts out of /oldroot

After mount moving /dev away, apps like plymouth can do reexec with fd
passing of devices, which they want to keep open until the very end.