This change set adds two features
1.Using Dell EqualLogic arrays as a backend for Cinder.
2. Enables multi backend support for gluster, Dell equalogic and ISCSI

1. is dependent on: https://review.openstack.org/89602
Merge branch 'cinder_enabled_backends' of https://github.com/rajinir/astapor into cinder_enabled_backends

Conflicts:
	puppet/modules/quickstack/manifests/cinder_controller.pp