"packaging.version" must be explicitly imported

[Rodolfo Alonso]

"packaging.version" must be explicitly imported. Also this module should be added to the requirements file. It was added to Neutron in https://review.opendev.org/#/c/757620/.

Error: http://paste.openstack.org/show/800200/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/763334

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/763334
Committed: https://opendev.org/openstack/neutron/commit/fd335b40373c4b5e7f9ddac3e02dcd9a9917118a
Submitter: Zuul
Branch: master

commit fd335b40373c4b5e7f9ddac3e02dcd9a9917118a
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Thu Nov 19 10:02:34 2020 +0000

    Import packaging.version explicitly

    "packaging.version" should be imported explicitly to avoid the
    following error:
      >>> import packaging
      >>> packaging.version
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
      AttributeError: module 'packaging' has no attribute 'version'

    This patch also inclues "packaging" in the requirements file.

    Change-Id: Ibd277e2fcc152fcf7c81ef7470e3beb0c668575c
    Closes-Bug: #1904854

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 18.0.0.0rc1 release candidate.