Comment 3 for bug 1819374

Reviewed: https://review.openstack.org/642387
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=d52c8fea06e333c9cda42eb60925a112203fc83a
Submitter: Zuul
Branch: master

commit d52c8fea06e333c9cda42eb60925a112203fc83a
Author: Balazs Gibizer <email address hidden>
Date: Mon Mar 11 10:05:02 2019 +0100

    fix race in test_interface_detach_with_port_with_bandwidth_request

    During port detach the unbind towards neutron happens before the
    port allocation is removed from placement. The functional test only
    waited for the port unbind before asserted the remaining allocations and
    therefore it was racy.

    Fortunately the instance.interface_detach.end is emitted after the both
    the unbind and the allocation shrink. So the test is changed to wait for
    this notification instead.

    Change-Id: I53d76d6353ae634e387672e14943f518955b221e
    Closes-Bug: #1819374