Use new cinder classes from non-HA controllers

Switch out old cinder_controller class in favor of new cinder and
cinder_volume classes.

Implementation for BZ "Openstack-foreman: Can't install nfs backend
for cinder"
https://bugzilla.redhat.com/show_bug.cgi?id=1064958
Reuse cinder_volume in Block Storage host group
Add Dell EqualLogic backend for Cinder

Based on Rajini's pull request:
https://github.com/redhat-openstack/astapor/pull/210

Implementation for BZ "Multi-instance (on Multi-Backend) Dell
EqualLogic Cinder Support":
https://bugzilla.redhat.com/show_bug.cgi?id=1105218

Co-Authored-By: Rajini Ram <rajini_ram@dell.com>