Add Python3 victoria unit tests

This is an automatically generated patch to ensure unit testing
is in place for all the of the tested runtimes for victoria.

See also the PTI in governance [1].

[1]: https://governance.openstack.org/tc/reference/project-testing-interface.html

Change-Id: I28b8fc9884bff9df495e0ea9f0b5e4420880afd5

zuul.d/layout.yaml

@@ -2,7 +2,7 @@
     templates:
       - check-requirements
       - openstackclient-plugin-jobs
-      - openstack-python3-ussuri-jobs
+      - openstack-python3-victoria-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
       - tripleo-buildimage-jobs
@@ -32,7 +32,7 @@
             dependencies: &deps_unit_lint_cprovider
               - openstack-tox-pep8
               - openstack-tox-py36
-              - openstack-tox-py37
+              - openstack-tox-py38
               - tripleo-ci-centos-8-content-provider
         - tripleo-ci-centos-8-standalone:
             vars: &sa_consumer_vars