[CI][um-only] Force use of ansible 9 for py36 job

This branch still has py36 as supported runtime (with ubuntu bionic
nodeset). But that requires ansible version 9, which is not supported
anymore in Zuul, but can be forced to use it until that is completely
dropped from Zuul.

Change-Id: I4defe14c768fd18fa1e65568e2579a22cf1d6a88
Signed-off-by: Elod Illes <[email protected]>

Author: Elod Illes

zuul.d/job-templates.yaml

@@ -3,6 +3,7 @@
     check:
       jobs:
         - openstack-tox-py36:  # from openstack-python3-yoga-jobs template
+            ansible-version: 9
             timeout: 3600
             irrelevant-files:  &irrelevant-files
               - ^.*\.conf\.sample$
@@ -34,6 +35,7 @@
     gate:
       jobs:
         - openstack-tox-py36:  # from openstack-python3-yoga-jobs template
+            ansible-version: 9
             timeout: 3600
             irrelevant-files:  *irrelevant-files
         - openstack-tox-py39: # from openstack-python3-yoga-jobs template