Avoid multiple bind of same resource.
Merge pull request #121 from adrian-rosello/feature/avoid-multiple-bind

Avoid multiple bind of same resource.
Disable system.out in REST API provider
RequestMapping between IResources, no longer using IRootResources.
NetworkSubResource wrapper.
Fix network features.
Delegate network creation to subnetworks when required.
RootResourceManagement should not be bound to Nitos networks.
Add comments to the RootResourceRequest class.
Create wrapper class used in NetworkManagement to get resources capabilities.
Create method in Request class for repeated code.
Networkmanagement continuation: slice resources.
Network creation is aware of Links.
Encapsulate logic of link creation.
Remove debug option from NetworkManagementTest
Merge pull request #122 from adrian-rosello/fix/avoid-syso

Disable system.out in REST API provider
NetworkPortmanagement binds to RequestResource.
NetworkManagement is aware of network external ports.
RootResourceProvider exports method to initialize capability.
NetworkManagement is aware of its resources.