Comment 7 for bug 1849196

Reviewed: https://review.opendev.org/690090
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=8af8bc48a58fc9a2e45a89a24069f7cae0af8235
Submitter: Zuul
Branch: stable/rocky

commit 8af8bc48a58fc9a2e45a89a24069f7cae0af8235
Author: Keith Berger <email address hidden>
Date: Mon Oct 21 16:20:51 2019 -0400

    Fix aes-xts key length in Horizon Admin Guide / Manage Volumes

    When using aes-xts-plain64, a 512 bit key produces an error as this
    is not a supported barbican key length for aes-xts-plain64. This patch
    updates the horzion admin doc to remove the reference of a 512 bit key.

    Change-Id: Ie36e05a1e59eb88b779c9f3249a714c20b5f5fe0
    Closes-Bug: #1708505
    Closes-Bug: #1849196
    (cherry picked from commit 85a1dddf126691921924edcecaee5c054c7df6c2)