Comment 4 for bug 1649914

Reviewed: https://review.openstack.org/418372
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-os_cinder/commit/?id=e34ba7b5aa1fc255d572c5c00cb8f816a91123c1
Submitter: Jenkins
Branch: stable/newton

commit e34ba7b5aa1fc255d572c5c00cb8f816a91123c1
Author: Andy McCrae <email address hidden>
Date: Wed Dec 21 18:02:07 2016 +0000

    Ensure all cinder_backends are created

    Combine all cinder_volume host's "cinder_backends" var to ensure all
    cinder_backends are created, and there is no race condition setting up
    the same backend for multiple hosts (e.g. rbd backends which exist on
    multiple volume servers).

    This adds a second cinder_volume node for testing, with a new backend,
    as well as the old backend - this should ensure duplicate backends are
    not created whilst backends are created for each cinder_volumes host.

    Change-Id: I1c2fb1ef07423fc415622767ff09f058c773c1ed
    Closes-Bug: 1649914
    (cherry picked from commit 879082f204cd848f1423714a3d93943c4c7d9fa6)