Comment 3 for bug 1815345

Reviewed: https://review.openstack.org/634276
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=b197f7c1c4b9c0dd4c58f5c5a4b654dde5596b85
Submitter: Zuul
Branch: master

commit b197f7c1c4b9c0dd4c58f5c5a4b654dde5596b85
Author: Adrian Chiris <email address hidden>
Date: Thu Jan 31 18:51:33 2019 +0200

    Delete port binding level for deleted bindings

    Today, if live migration has failed after an inactive
    binding was created on the destination node but before
    the activation of the created binding, the port's binding level
    for the destination host is not cleared during nova's API call
    to neutron to delete the port binding.

    This causes future attempts to perform live migration
    of the instance to the same host to fail.

    This change removes port binding level object during port binding
    deletion.

    Closes-Bug: #1815345

    Change-Id: Idd55f7d24a2062c08ac8a0dc2243625632d962a5