Add non-voting py39 jobs to Wallaby templates

Python 3.9 is available on Ubuntu Focal. This enables non-voting
tox py39 jobs for the Wallaby templates.

Change-Id: I142a78a5c06e2ababfca147620ceb4b3a12d5646

zuul.d/jobs.yaml

@@ -255,6 +255,35 @@
 
       Uses tox with the ``py38`` environment in arm64 platform.
 
+- job:
+    name: openstack-tox-py39
+    parent: openstack-tox
+    nodeset: ubuntu-focal
+    timeout: 2400
+    description: |
+
+      Run unit tests for an OpenStack Python project under cPython
+      version 3.9.
+
+      Uses tox with the ``py39`` environment.
+    irrelevant-files: *common-irrelevant-files
+    vars:
+      tox_envlist: py39
+      bindep_profile: test py39
+      python_version: 3.9
+
+- job:
+    name: openstack-tox-py39-arm64
+    parent: openstack-tox-py39
+    nodeset: ubuntu-focal-arm64
+    timeout: 3600
+    description: |
+
+      Run unit tests for an OpenStack Python project under cPython
+      version 3.9 on top of arm64 architecture.
+
+      Uses tox with the ``py39`` environment in arm64 platform.
+
 - job:
     name: openstack-tox-pypy
     parent: openstack-tox

zuul.d/project-templates.yaml

@@ -486,6 +486,8 @@
         - openstack-tox-pep8
         - openstack-tox-py36
         - openstack-tox-py38
+        - openstack-tox-py39:
+            voting: false
     gate:
       jobs:
         - openstack-tox-pep8
@@ -513,6 +515,10 @@
         - openstack-tox-py38:
             required-projects:
               - openstack/horizon
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/horizon
+            voting: false
     gate:
       jobs:
         - openstack-tox-pep8:
@@ -546,6 +552,10 @@
         - openstack-tox-py38:
             required-projects:
               - openstack/neutron
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/neutron
+            voting: false
     gate:
       jobs:
         - openstack-tox-pep8:
@@ -579,6 +589,10 @@
         - openstack-tox-py38:
             required-projects:
               - openstack/ceilometer
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/ceilometer
+            voting: false
     gate:
       jobs:
         - openstack-tox-pep8:
@@ -625,6 +639,8 @@
       jobs:
         - openstack-tox-py38-arm64:
             voting: false
+        - openstack-tox-py39-arm64:
+            voting: false
 
 - project-template:
     name: openstack-python3-victoria-jobs-arm64