Add rbd option to cinder configuration

Extend the support of cinder for rbd volume types by adding the
configuration variables needed (including parametrizing the
cinder_volume_driver to either 'iscsi' or 'rdb') and passing them on to
the cinder puppet module.

Change-Id: Id01e6346be85f9b4b70b11696b2395a09213ef05
Merge "Add rbd option to cinder configuration"
Force users to set the mysql root password

Fixes bug 1191068

Change-Id: Ic05bbe3648e9e606290218da4215415cb211d09d
Fix smoke tests and update examples in README

* Add missing params and remove deprecated params from tests
* Fix classname changes
* Add new smoketests for testfile and auth_file
* Update README with new params

Change-Id: Ib25fcd6545aa704f64dd0709a75700480eaff684