Comment 8 for bug 1929676

Reviewed: https://review.opendev.org/c/openstack/neutron/+/793141
Committed: https://opendev.org/openstack/neutron/commit/db2207f32d2b88772966e4e2a4f10e2ad66fcf49
Submitter: "Zuul (22348)"
Branch: master

commit db2207f32d2b88772966e4e2a4f10e2ad66fcf49
Author: Slawek Kaplonski <email address hidden>
Date: Wed May 26 12:52:39 2021 +0200

    [ML2] Change way how list of supported API extensions is made

    Previously if extension was not supported by one of the mech drivers,
    but it wasn't filtered out by next mech driver, it was available finally
    in the list.
    Now, this patch changes that so if extension is disabled by one of the
    drivers it isn't available on the list at all.
    This will work better e.g. with discoverability of what is available
    e.g. when OVN backend is used by Neutron.

    Closes-Bug: #1929676
    Change-Id: I6a4ff42f47f7ee90365516d37472c09ac87773e5