Integrate monitoring into associated roles

Monitoring was a stand alone playbook, that was almost like a role, but
not quite. This change moves all the monitoring tasks directly into the
associated roles for those tasks.

All the tasks have been tagged with "monitoring" and "common" which can
allow for doing a monitoring only run.

nimble was put into the cinder control role, but that can easily be
moved elsewhere if desired.

WARNING!
This passes syntax check, but certainly needs to be ran in a test environment to compare differences between old style and new style before merging.

Fixes #603