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: Ie265c8ffa422c41d9f01f33a3ea937ed73bf6b47
Story: #2002586
Task: #24332

.zuul.yaml

@@ -1,4 +1,11 @@
 - project:
+    templates:
+      - openstack-python-jobs
+      - openstack-python35-jobs
+      - periodic-stable-jobs
+      - publish-openstack-sphinx-docs
+      - check-requirements
+      - release-notes-jobs
     check:
       jobs:
         - openstack-tox-pylint:
@@ -6,7 +13,15 @@
         - sahara-tests-scenario
         - sahara-tests-tempest
         - openstack-tox-lower-constraints
+        - openstack-tox-cover:
+            voting: false
+        - legacy-grenade-dsvm-sahara:
+            voting: false
+            irrelevant-files:
+              - ^(test-|)requirements.txt$
+              - ^setup.cfg$
     gate:
+      queue: sahara
       jobs:
         - sahara-tests-scenario
         - sahara-tests-tempest
@@ -18,6 +33,9 @@
         - sahara-buildimages-mapr
         - sahara-tests-scenario-multinode-spark
         - sahara-tests-scenario-py3
+    post:
+      jobs:
+        - openstack-tox-cover
 
 - job:
     name: sahara-buildimages-base