[tempest][tests] Usage of obsolete wait_for_backup_deletion

[Nikolay Starodubtsev]

We use wait_for_backup_deletion method in our tempest tests. It was removed from tempest in this commit as redundant https://github.com/openstack/tempest/commit/153b3d9207aaf144ce6392b1127c71d309a52070
However we use it only in CindeVolumes test suite which is not currently running.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/375289

[OpenStack Infra (hudson-openstack)]

Change abandoned by Nikolay Starodubtsev (<email address hidden>) on branch: master
Review: https://review.openstack.org/375289
Reason: will be included in https://review.openstack.org/#/c/352160/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/352160
Committed: https://git.openstack.org/cgit/openstack/murano/commit/?id=f547dff5c4da25474d6b169481f5a99105bffd71
Submitter: Jenkins
Branch: master

commit f547dff5c4da25474d6b169481f5a99105bffd71
Author: Victor Ryzhenkin <email address hidden>
Date: Mon Aug 8 02:31:23 2016 +0300

    Repair cinder integration tests

    - Use image from nova scenario tests for cinder tests
    - Correct environment status wait function
    - Replace backup waiters with new tempest changes
    - Use devstack trueorfalse common function to determine
    boolean values

    Closes-Bug: #1626872

    Change-Id: Id2172d3d9b314eb8132d97ec8868028c714a35c3

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/murano 3.1.0 release.