- project:
    templates:
      - check-requirements
      - publish-openstack-docs-pti
      - openstack-python35-jobs
      - openstack-python3-wallaby-jobs

- project:
    templates:
      - check-requirements
      - publish-openstack-docs-pti
      - openstack-python35-jobs
      - openstack-python3-xena-jobs

Switch testing to Xena testing runtime
Switch testing to Xena testing runtime

Upating the tetsing template to Xena testing runtime:
https://governance.openstack.org/tc/reference/runtimes/xena.html

Change-Id: I18fa6b0f12114df57376c47f6e185796505572dc
