Code review comment for lp:~justin-fathomdb/nova/constraint-scheduler

Nachi: There are tests already for the constraint scheduler, but the only constraints implemented in this branch are ones that assign to the least-loaded machine. If you look in the derived branch, there are examples of more advanced constraints and better tests

In the derived branch, I add a constraint that favors putting a compute node as close as possible to a specified location, based on a topology:
https://code.launchpad.net/~justin-fathomdb/nova/schedule-compute-near-volume/+merge/52520