Ofertie/monitoring

Merge branch develop with ofertie-monitoring.

Contains

* ControllerInformation Capability for OpenflowSwitch
* Authentication in NCL.
* CircuitStatistics Capability for generic network.
* PortStatistics Capabiltiy for generic network.
* Notifications from NCL to SDN module when flows are created,removed, or updated.
* Notification to SLA through rabbitMQ client.