Integration between Cloud monitoring and refactoring/optimization

[rosogon]

Monitoring has been setup on openstack this way: a NodeExporter is already available on each created VM, and these exporters are contacted by Prometheus. The current available information for refactoring and optimization is at https://github.com/prometheus/node_exporter

A skydive exporter is also providing networking information to Prometheus, but I think needs to be configured. For details about this, contact @KalmanMeth .

Additionally, the IPMI exporter provides consumption metrics on the physical nodes.

To be identified by @IndikaKuma and @kartshy needed metrics. After that, we can try to find/implemented other exporters.

[KalmanMeth]

Skydive-Prometheus connector base on Skydive flow exporter has been added to the Sodalite blueprint.
This now awaits expected changes to Prometheus configuration in Sodalite.