Add fact and resource_limits.conf entry for no_overcommit
Add flock around container creation and additional check for node capacity if no_overcommit is true, add GearCreationException for this case, and add return code of 130 to oo-app-create if it gets GearCreationException on create
minor fixups
Done shell out to call oo-node-utilization from mcollective node plugin
Use oo-node-utilization for capacity check only if no_overcommit is true
minor fixups
Better error to user