Merge "Use Python3 yoga unit tests"

zuul.d/layout.yaml

@@ -3,7 +3,7 @@
       - check-requirements
       - openstack-cover-jobs
       - openstackclient-plugin-jobs
-      - openstack-python3-xena-jobs
+      - openstack-python3-yoga-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
       - tripleo-buildimage-jobs
@@ -18,7 +18,7 @@
             dependencies:
               - openstack-tox-pep8
               - openstack-tox-py36
-              - openstack-tox-py38
+              - openstack-tox-py39
         - tripleo-ci-centos-8-standalone:
             vars:
               enable_validation: true