Comment 11 for bug 1781286

Reviewed: https://review.openstack.org/581910
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=1160ae7a6585c1567e2e91badb4c312533d15686
Submitter: Zuul
Branch: master

commit 1160ae7a6585c1567e2e91badb4c312533d15686
Author: Matt Riedemann <email address hidden>
Date: Wed Jul 11 19:21:44 2018 -0400

    Add another up-call to the cells v2 caveats list

    Due to change I8d426f2635232ffc4b510548a905794ca88d7f99 in Pike,
    which ironically was meant to avoid up-calls (I think), it
    introduced an up-call during reschedules for server create and
    resize to set the instance.availability_zone based on the
    alternate host selected during the reschedule.

    This adds the up-call to our list of known issues in the cells
    v2 docs so we can track the issue and make people aware of it.

    Change-Id: Id819f91477613a013b89b1fb0b2def3b0fd4b08c
    Related-Bug: #1781286