neutron-lib duplicates os-resource-classes constants

[Balazs Gibizer]

The os-resource-classes lib is the official source of the standard placement resource classes. The neutron-lib repo has a copy of those constants[1]. Instead of duplicating the names, neutron-lib could depend on the os-resource-classes lib and import the constants from there[2].

[1] https://github.com/openstack/neutron-lib/blob/63c8443a65db4c662237b8687beff19c3973b819/neutron_lib/placement/constants.py#L20-L21
[2] https://github.com/openstack/os-resource-classes/blob/3aead5dd249d753a85585879ea501e1f4f4bcd17/os_resource_classes/__init__.py#L59-L62

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron-lib/+/799034

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/799676

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron-lib/+/799034
Committed: https://opendev.org/openstack/neutron-lib/commit/44b3fc3f1821022aa5662b87a749b6b0eddaff20
Submitter: "Zuul (22348)"
Branch: master

commit 44b3fc3f1821022aa5662b87a749b6b0eddaff20
Author: Przemyslaw Szczerbik <email address hidden>
Date: Thu Jul 1 12:11:21 2021 +0200

    Add a TODO note for resource classes constants

    The os-resource-classes lib is the official source of the standard
    placement resource classes. Currently, the neutron-lib contains a copy
    of those constants. This code duplication shall be fixed with next
    major neutron-lib release. For the time being, add a TODO note
    informing that those constants shouldn't be used.

    Related-Bug: #1934256
    Change-Id: Iee08835fd30d43249a261aa0c0a0b6f2cda08ea4

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/799676
Committed: https://opendev.org/openstack/neutron/commit/26b06d246a345029ca9eb2137c1be14338f0dcae
Submitter: "Zuul (22348)"
Branch: master

commit 26b06d246a345029ca9eb2137c1be14338f0dcae
Author: Przemyslaw Szczerbik <email address hidden>
Date: Tue Jul 6 15:27:01 2021 +0200

    Use os-resource-classes lib for resource classes names

    The os-resource-classes lib is the official source of the standard
    placement resource classes. Currently, the neutron-lib contains a copy
    of those constants. However, they are already marked as deprecated and
    are going to be removed with next major release.

    Related-Bug: #1934256
    Change-Id: I33ecd6f32410f9b7ab1e87a6640201ea157bc383