Renames cinder::base to cinder.

This makes things consistent with other puppet openstack modules
(Nova in particular).

For backwards compat we still have a cinder::base module which
uses init.pp but prints out a warning message.

Change-Id: Ie101ae192b7ff08825809aff975f6cc6e655e6b3
Merge "Renames cinder::base to cinder."