SDB Talk:Disable btrfsmaintenance

Changes to openSUSE utilization of btrfsmaintenance

* Add missing btrfsmaintenance-refresh.path [bsc#1084871]
* Removed call to btrfsmaintenance-refresh-cron.sh upon deletion
(not needed anymore since we use systemd timers which are
handled by macros).
* Switch default of btrfsmaintenance-refresh.service to systemd-timer,
too (btrfsmaintenance-switch-to-timer.patch) [bsc#1073204]
* Don't call btrfsmaintenance-refresh-cron.sh in %post, this is
done already by the systemd macros

https://lists.opensuse.org/opensuse-factory/2018-05/msg00213.html

Check what systemd units exists with:

systemctl list-unit-files | grep -i 'btrfs'

https://forums.opensuse.org/showthread.php/533154-btrfs-balance-start-problems