Train updates needed for neutron removal of trunk constants

[Corey Bryant]

networking-hyperv is currently broken on train since the following commit landed in neutron:

commit 88cca4cabef1ac6d86700f03ce4fad1c49e35070
Author: Boden R <email address hidden>
Date: Tue Apr 2 07:29:19 2019 -0600

    use trunk constants from neutron-lib

    The trunk constants now live in neutron-lib. This patch consumes them
    by removing neutron.services.trunk.constants and using them from
    neutron-lib instead.

    Depends-On: https://review.opendev.org/#/c/650372/

    NeutronLibImpact

    Change-Id: I4445c44c7e321d0fc35976d4d855c148bb9a3b18

[Claudiu Belu (cbelu)]

Addressed by: https://review.opendev.org/#/c/675572/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/675572
Committed: https://git.openstack.org/cgit/openstack/networking-hyperv/commit/?id=79148e1dbf4e3249598f509bbedf038b691654d6
Submitter: Zuul
Branch: master

commit 79148e1dbf4e3249598f509bbedf038b691654d6
Author: Claudiu Belu <email address hidden>
Date: Fri Aug 9 02:39:33 2019 -0700

    Uses neutron_lib trunk constants

    The neutron trunk constants have been moved to neutron_lib.

    Change-Id: I55eecfe1b2f27cccd30f02cab6778f54856a2cfa
    Closes-Bug: #1839574

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-hyperv 7.3.0 release.