Move master template from py36 to py39

Below master template has been moved to py39 based
testing
- periodic-jobs-with-neutron-lib-master
- periodic-jobs-with-oslo-master
- periodic-jobs-with-ovsdbapp-master

Change-Id: Ic176f01330e680b0dcebf955e219b634c50d55c8

zuul.d/jobs.yaml

@@ -897,6 +897,54 @@
     vars:
       tox_install_siblings: true
 
+- job:
+    name: openstack-tox-py39-with-oslo-master
+    parent: openstack-tox-with-oslo-master-base
+    nodeset: ubuntu-focal
+    description: |
+      This job installs all oslo libraries from source and tests that the
+      unit tests of the tested project work.
+      It uses the tox ``py39`` environment.
+      The job is normally run in a periodic pipeline, it is configured
+      to run on the master branch.
+    branches: master
+    vars:
+      tox_envlist: py39
+      bindep_profile: test py39
+
+- job:
+    name: openstack-tox-py39-with-neutron-lib-master
+    parent: openstack-tox-py39
+    timeout: 3000
+    description: |
+      This job installs neutron-lib from source and tests that the
+      unit tests of the tested project work.
+      It uses the tox ``py39`` environment.
+      The job is normally run in a periodic pipeline, it is configured
+      to run on the master branch.
+    branches: master
+    required-projects:
+      - openstack/neutron
+      - openstack/neutron-lib
+    vars:
+      tox_install_siblings: true
+
+- job:
+    name: openstack-tox-py39-with-ovsdbapp-master
+    parent: openstack-tox-py39
+    timeout: 3000
+    description: |
+      This job installs ovsdbapp from source and tests that the
+      unit tests of the tested project work.
+      It uses the tox ``py39`` environment.
+      The job is normally run in a periodic pipeline, it is configured
+      to run on the master branch.
+    branches: master
+    required-projects:
+      - openstack/ovsdbapp
+    vars:
+      tox_install_siblings: true
+
 - job:
     name: openstack-tox-lower-constraints
     parent: openstack-tox

zuul.d/project-templates.yaml

@@ -2378,7 +2378,7 @@
       neutron-lib from source.
     periodic:
       jobs:
-        - openstack-tox-py36-with-neutron-lib-master
+        - openstack-tox-py39-with-neutron-lib-master
 
 - project-template:
     name: periodic-jobs-with-oslo-master
@@ -2387,7 +2387,7 @@
       oslo libraries from source.
     periodic:
       jobs:
-        - openstack-tox-py36-with-oslo-master
+        - openstack-tox-py39-with-oslo-master
 
 - project-template:
     name: periodic-jobs-with-ovsdbapp-master
@@ -2396,7 +2396,7 @@
       ovdsdbapp from source.
     periodic:
       jobs:
-        - openstack-tox-py36-with-ovsdbapp-master
+        - openstack-tox-py39-with-ovsdbapp-master
 
 - project-template:
     name: python-charm-interface-jobs