Use MAX_TRES by default
Use MAX_TRES by default

With MAX_TRES one can roughly implement Dominant Resource Fairness,
http://static.usenix.org/event/nsdi11/tech/full_papers/Ghodsi.pdf,
which is a sensible approach for fairly sharing multiple resource
types such as CPU and memory.

CSC-IT-Center-for-Science/ansible-role-slurm,tiggi/ansible-role-slurm