[build] Move hwloc version to 1.9.
[scheduling] More debug output with better formatting.
[scheduling] Streamlined resource addition code in flow graph, and fixed the odd bug that sometimes would see no leaf arcs being set up to the sink.
[scheduling] Fix flow graph tests to have full resource topology and add special case for root node in branch configuration.
Merge branch 'malte' into cost_model
Merge branch 'cost_model' into cost_model_preemption (adding the flow graph changes)

Conflicts:
	src/scheduling/flow_graph.cc
Taking into account RPS when deciding the amount of jobs to schedule.