Enable deployment of performance monitoring

TripleO should have a possibility to automatically setup and install the performance monitoring stack (Grafana, Graphite/WhisperDB and CollectD) to service the overcloud.

All components of the performance monitoring will be deployed by TripleO using Heat+Puppet. The Grafana and Graphite/WhisperDB services will be deployed on a stand alone node deployed by the undercloud, with a dedicated purpose for all optools (not only performance monitoring, but also availability monitoring and centralized logging in future).
The Optools node will be deployed as a separate Heat stack to the overcloud stack.

The collectd service will be deployed as a composable role on the overcloud stack.