Use publish-to-pypi for instack-undercloud

Jobs were duplicated as part of the process to deprecate master,
but we need the template to be used in order to do releases for
stable branches. Adding the template back is OK now that master
is closed for changes anyway.

Change-Id: Ibec07dfc1131ff6b8fd2670c8ebf0b9f36f28a33

zuul.d/projects.yaml

@@ -4497,34 +4497,12 @@
 
 - project:
     name: openstack/instack-undercloud
-    # NOTE(aschultz): these have to dupe the publish-to-pypi jobs
-    # because of the branch designation for the release job
+    templates:
+      - publish-to-pypi
     check:
       queue: tripleo
-      jobs:
-        - noop:
-            branches: master
-        - test-release-openstack:
-            branches: ^(?!master).*$
     gate:
       queue: tripleo
-      jobs:
-        - noop:
-            branches: master
-        - test-release-openstack:
-            branches: ^(?!master).*$
-    pre-release:
-      jobs:
-        - release-openstack-python
-    release:
-      jobs:
-        - release-openstack-python
-        - announce-release:
-            dependencies:
-              - release-openstack-python
-        - propose-update-constraints:
-            dependencies:
-              - release-openstack-python
 
 - project:
     name: openstack/intel-nfv-ci-tests