tests: expand the list of cgroup devices written

Hopefully this would/will trigger more of these types of bugs; I took this
list straight from Adrian's report.

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
CC: Adrian Reber <adrian@lisas.de>
Tested-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>