cinder-api in master role test fails

[Jean-Philippe Evrard]

running a ./run_tests.sh from openstack-ansible-os_cinder fails on cinder-api online verification.

Indeed haproxy sees the cinder-api as DOWN, and the logs of cinder-api is the following:
http://paste.openstack.org/show/622470/

[Jean-Philippe Evrard (jean-philippe-evrard)]

This also breaks magnum test.

[Jimmy McCrory (jimmy-mccrory)]

castellan is providing a default for key_manager/backend, 'barbican'
https://github.com/openstack/castellan/blob/0.14.0/castellan/key_manager/__init__.py#L24-L30

cinder is expecting that value to be an importable class
https://github.com/openstack/cinder/blob/master/cinder/keymgr/__init__.py#L29

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/509768

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/509768
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-os_cinder/commit/?id=9ad69a9e9d86abdd192f9d418f189d71c170bc59
Submitter: Jenkins
Branch: master

commit 9ad69a9e9d86abdd192f9d418f189d71c170bc59
Author: Jean-Philippe Evrard <email address hidden>
Date: Thu Oct 5 12:48:56 2017 +0000

    Workaround bad cinder defaults

    key_manager/backend default value is 'barbican'.
    While castellan resolves this to a class using stevedore,
    cinder loads it tries to load it directly.
    So it fails if the value of backend is not set to a full class.

    Change-Id: Ia8417bbdac3f515e42d1ed760110a63ae14f8f00
    Partial-Bug: #1721037