Comment 9 for bug 1703629

Reviewed: https://review.openstack.org/605881
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8b3b8e5657ffe0f12e1ccfbe6d978e62a2bfdc89
Submitter: Zuul
Branch: stable/ocata

commit 8b3b8e5657ffe0f12e1ccfbe6d978e62a2bfdc89
Author: Steven Webster <email address hidden>
Date: Mon Jun 12 17:10:03 2017 -0400

    Fix instance evacuation with PCI devices

    update_port_binding_for_instance() now checks that a valid migration
    object exists as a parameter before any mapping between old/new PCI
    devices can occur. A migration should be present in the case of a
    cold migration, resize, or evacuation.

    An evacuation (being a special case of a rebuild) however, will not
    pass a migration to update_port_binding_for_instance, as it
    is called directly from setup_instance_network(). This calling function
    does not currently take a migration parameter, even though one will
    certainly exist for an evacuation.

    This commit adds an optional migration parameter to
    setup_instance_network_on_host() and passes any migration object to
    the port update routine.

    Closes-Bug: #1703629
    Related-Bug: #1677621
    Related-Bug: #1630698

    Change-Id: I4e394c8d275995eac4b049a7b1329ea90f2394be
    (cherry picked from commit b930336854bffec1bb81b6d67079a4df59e0af19)
    (cherry picked from commit b9c1a58dd033fa8feeb1175956d57dc90aa55acd)