Comment 6 for bug 1762876

Reviewed: https://review.openstack.org/560454
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4afa8c2b97929faaf8bbf2bbaa72235fab7d3d13
Submitter: Zuul
Branch: master

commit 4afa8c2b97929faaf8bbf2bbaa72235fab7d3d13
Author: Matt Riedemann <email address hidden>
Date: Wed Apr 11 10:43:34 2018 -0400

    Fix race fail in test_resize_with_reschedule_then_live_migrate

    The assertion in the test that the migration status is 'completed'
    is flawed in that it assumes when the instance status is 'ACTIVE'
    the migration is completed, which isn't True, since the instance
    status gets changed before the migration is completed, but they are
    very close in time so there is a race, which is how this test slipped
    by. This fixes the issue by polling the migration status until it
    is actually completed or we timeout.

    Change-Id: I61f745667f4c003d7e3ca6f2f9a99194930ac892
    Closes-Bug: #1762876