Mapping submodule now can resolve exclusiveness.
Node has two more oproperties (available_cpu, available_ram) related to non exclusive resources, representing their utilization.
adds a getter for @@oprops array in oresource.
On create new resource in Rest interface do:
1) if it is a lease ignore all non existing components
2) if it is a component link to existing resources or create new ones if they don't exist
Tests related to previous commits