Comment 4 for bug 1631872

Reviewed: https://review.openstack.org/399001
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=00fdf284085866c77590255059ae74b672dd5a85
Submitter: Jenkins
Branch: master

commit 00fdf284085866c77590255059ae74b672dd5a85
Author: Claudiu Belu <email address hidden>
Date: Thu Nov 17 13:10:06 2016 +0200

    hyper-v: wait for neutron vif plug events

    During spawn, the Hyper-V driver should wait for the Neutron
    VIF plug events before starting the instance, in order to ensure
    that the VIFs are already bound and the guest will be able to
    send DHCP requests.

    The configuration option "vif_plugging_timeout" will determine
    the maximum amount of time to wait for the Neutron events.

    Setting the configuration option "vif_plugging_is_fatal" to True
    will cause an exception to be raised during spawn, if the Hyper-V
    driver did not receive needed Neutron port bound events.

    Closes-Bug: #1631872

    Change-Id: Ie8b4cc64f580aca1115d88258728ab90241d112b