Comment 7 for bug 1651887

Reviewed: https://review.openstack.org/466307
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=fcc931f4017ab4bb830ff645431edaa8a18bf880
Submitter: Jenkins
Branch: stable/ocata

commit fcc931f4017ab4bb830ff645431edaa8a18bf880
Author: Kaitlin Farr <email address hidden>
Date: Fri Mar 10 18:09:49 2017 -0500

    Parse algorithm from cipher for ephemeral disk encryption

    Nova's keymgr implementation used to have default values
    for the algorithm and bit length. Castellan does not have
    default values, and when Castellan replaced keymgr in
    Ib563b0ea4b8b4bc1833bf52bf49a68546c384996, the parameters
    to the create_key method were not updated. This change
    parses the algorithm from the cipher value and passes it
    to Castellan's key manager interface.

    Conflicts:
          nova/tests/unit/compute/test_compute.py

    NOTE(mriedem): The conflicts are due to import order changes
    in pike for flake8 order checking.

    Closes-Bug: #1651887
    Change-Id: Ib90bc7571aef59325be0efe123fcf12e86252b85
    (cherry picked from commit 1d3acad111c5106592b0921628480fcf41e0fb4c)