Currently the owl nodes are located on top of the rack and turning them
off causes a high temperature increase at that region, which accumulates
heat from the whole rack. To maximize airflow we will leave them on at
all times. This also makes allocations immediate at the extra cost of
around 200 W.
In the future, if we include more nodes in SLURM we can configure those
to turn off if needed.
Fixes: #156
