import zuul job settings from project-config

This is a mechanically generated patch to complete step 1 of moving
the zuul job settings out of project-config and into each project
repository.

Because there will be a separate patch on each branch, the branch
specifiers for branch-specific jobs have been removed.

Because this patch is generated by a script, there may be some
cosmetic changes to the layout of the YAML file(s) as the contents are
normalized.

See the python3-first goal document for details:
https://governance.openstack.org/tc/goals/stein/python3-first.html

Change-Id: Ie5dc27b3b735842ba3f9beb0b911265cd7408831
Story: #2002586
Task: #24346

.zuul.yaml

@@ -1,4 +1,11 @@
 - project:
+    templates:
+      - openstack-python-jobs-horizon
+      - openstack-python35-jobs-horizon
+      - nodejs4-jobs
+      - check-requirements
+      - publish-openstack-sphinx-docs
+      - release-notes-jobs
     check:
       jobs:
         - openstack-tox-py36:
@@ -8,15 +15,15 @@
             vars:
               node_version: 4
             required-projects:
-              openstack/horizon
+              - openstack/horizon
         - nodejs-npm-run-test:
             vars:
               node_version: 4
             required-projects:
-              openstack/horizon
+              - openstack/horizon
         - openstack-tox-lower-constraints:
             required-projects:
-              openstack/horizon
+              - openstack/horizon
     gate:
       jobs:
         - horizon-openstack-tox-python3-django111
@@ -24,12 +31,12 @@
             vars:
               node_version: 4
             required-projects:
-              openstack/horizon
+              - openstack/horizon
         - nodejs-npm-run-test:
             vars:
               node_version: 4
             required-projects:
-              openstack/horizon
+              - openstack/horizon
         - openstack-tox-lower-constraints:
             required-projects:
-              openstack/horizon
+              - openstack/horizon