p.haul: Fix cgroup controller list generation
p.haul: Fix cgroup controller list generation

Cgroup controller names do not match external mount points, thus we
should use separate list to fill the controllers list. Also, ve and
beancounter controllers were missing, they're also added by this
patch.

Signed-off-by: Pavel Vokhmyanin <1afe89ea3cd28473a7b3ff23623e42f5749dcb82@virtuozzo.com>

xemul/p.haul,xemul/p.haul,xemul/p.haul,xemul/p.haul,xemul/p.haul