Add directory creation for /etc/cinder

Ensure /etc/cinder exists before trying
to create /etc/cinder/cinder.conf

fixes lp 1197930

Change-Id: I372603b56f0e4fd284f65f29b6260bb3c53289b8
Using new `["openstack"]["mq"]` attributes

Added grizzly rabbbit HA functionality, and switched to the
new mq attributes. Attributes were updated to allow global
and local overrides.

Change-Id: I10f92932fbe1bd256c5a6e10cd357a8ac5e5f1e0