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: I413e9e207c7f3472e19ce3f81593efdb409d000b
Story: #2002586
Task: #24316

.zuul.yaml

@@ -0,0 +1,30 @@
+- project:
+    templates:
+      - check-requirements
+      - openstack-python-jobs-horizon
+      - publish-openstack-sphinx-docs
+    check:
+      jobs:
+        - nodejs-npm-run-lint:
+            vars:
+              node_version: 4
+            required-projects:
+              - openstack/horizon
+        - nodejs-npm-run-test:
+            vars:
+              node_version: 4
+            required-projects:
+              - openstack/horizon
+    gate:
+      jobs:
+        - nodejs-npm-run-lint:
+            vars:
+              node_version: 4
+            required-projects:
+              - openstack/horizon
+        - nodejs-npm-run-test:
+            vars:
+              node_version: 4
+            required-projects:
+              - openstack/horizon
+