Configure zuul

Change-Id: I27ff259c91bb90e148e2131fb8c77be4d405648c

.zuul.yaml

 - project:
     templates:
-      - noop-jobs
+      - check-requirements
+      - lib-forward-testing-python3
+      - openstack-lower-constraints-jobs
+      - openstack-python3-victoria-jobs
+      - periodic-stable-jobs
+      - publish-openstack-docs-pti
+      - release-notes-jobs-python3