placement allocation update accepts only integers from 1

[Lajos Katona]

update_qos_minbw_allocation (see: https://opendev.org/openstack/neutron-lib/src/commit/245e005d1bbb9af5e57ff600fb97b2a13c85c83b/neutron_lib/placement/client.py ) assumes that placement allocation records can be updated by 0 (like:
{
  "allocations": {
    "4e061c03-611e-4caa-bf26-999dcff4284e": {
      "resources": {
        "NET_BW_EGR_KILOBIT_PER_SEC": 0
      }
    }
}

),
but that is not possible now, the way to do this is to delete the resource class,
see the storyboard story for this:
https://storyboard.openstack.org/#!/story/2008111

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/750349

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/750349
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=a61f9553d2074d160ac384313971421b7f063765
Submitter: Zuul
Branch: master

commit a61f9553d2074d160ac384313971421b7f063765
Author: elajkat <email address hidden>
Date: Tue Sep 8 13:08:45 2020 +0200

    remove rc from allocation dict if value is 0

    update_qos_minbw_allocation now deletes the resource class keys if the
    value for the give resource class is zero, as placement can't handle 0
    value updates, see the referenced story.

    Change-Id: Iaf23eb313507139c2de76146b82d148bcce9b3d6
    Closes-Bug: #1894825
    Related-Bug: #1882804
    Story: 2008111

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/victoria
Review: https://review.opendev.org/753230

[Balazs Gibizer (balazs-gibizer)]

It seems this bug hitting the nova-next job in the gate [1]

[1] https://zuul.opendev.org/t/openstack/build/e3ee0de50ff146339cfda071ab374cfc/log/job-output.txt#64835

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/753230
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=73d868b0770cc4ba8500e8058cadf66de98d7666
Submitter: Zuul
Branch: stable/victoria

commit 73d868b0770cc4ba8500e8058cadf66de98d7666
Author: elajkat <email address hidden>
Date: Tue Sep 8 13:08:45 2020 +0200

    remove rc from allocation dict if value is 0

    update_qos_minbw_allocation now deletes the resource class keys if the
    value for the give resource class is zero, as placement can't handle 0
    value updates, see the referenced story.

    Change-Id: Iaf23eb313507139c2de76146b82d148bcce9b3d6
    Closes-Bug: #1894825
    Related-Bug: #1882804
    Story: 2008111
    (cherry picked from commit a61f9553d2074d160ac384313971421b7f063765)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron-lib 2.7.0 release.