Comment 7 for bug 1749235

Reviewed: https://review.openstack.org/548873
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2ba48f3fa0c7665bb29c4f8de3e9efd130ae12a3
Submitter: Zuul
Branch: stable/queens

commit 2ba48f3fa0c7665bb29c4f8de3e9efd130ae12a3
Author: Matt Riedemann <email address hidden>
Date: Tue Feb 13 12:12:12 2018 -0500

    Fix and update compute schedulers config guide

    There were several things wrong with this doc since the migration
    in-tree in pike, which are handled here:

    - Updated options to use the current names.
    - Any mention of the periodic_task_interval option is removed
      since this doc is really about the FilterScheduler, and the
      periodic task interval is only used by the CachingScheduler to
      cache and refresh hosts, something the FilterScheduler doesn't do.
      The note about service_down_time is already covered in the help
      text for the periodic_task_interval option.
    - Removed a broken (and oddly placed) link to the block storage
      docs; it's unclear why the compute scheduler docs need to randomly
      link to the block storage docs for schedluing (maybe that was
      super legacy from the nova-volume days).
    - Fixed a broken link to the 'evacuate instances' docs.

    This change does not get into details for the individual filters
    or weighers, only the overview and filter scheduler description.

    Change-Id: Ie5bb9781e1997ad12521b5df5245a78b587a4a20
    Closes-Bug: #1749235
    (cherry picked from commit 8be8d02aa77ebbe6687fa9ec4c74949cde0bf596)