Bug#616688: mdadm: crontab's array check should not report the error

[Dmitry Katsubo]

Package: mdadm
Version: 3.1.4-1+8efb9d1
Severity: whishist

/etc/cron.d/mdadm should call checkarray with "-Q" to ignore the error
message, which is reported by crontab with email:

> Subject:  Cron <root at centurion> if [ -x /usr/share/mdadm/checkarray ] && [ $(date +%d) -le 7 ]; then /usr/share/mdadm/checkarray --cron --all --idle --quiet; fi (failed)
>
> checkarray: E: MD subsystem not loaded, or /proc unavailable.