Add cinder::rabbitmq class.

Updates the cinder module so that it supports full Rabbitmq
configuration for the Cinder service. Previously the Cinder module
piggy-backed on the Nova module for its Rabbitmq configuration.

It is now possible to configure Cinder with its own Rabbitmq
service/vhost/etc.

Change-Id: I1ce84d0716d333fe68d3a60ba7d7543c93a70ba3
Add support for configuring qpid.

Support for qpid which uses dprince/qpid (posted on puppetforge).

Currently requires dprince/qpid 1.0.0 or greater.

Change-Id: I504e4aac985b50f9a64a19ec5445e5c2c39de720