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

Remove stein from toc, there's no spec yet and zuul complains about an
empty toc.

Change-Id: Iede70fc477d0fe7b0b63336d1e120d5d5c23160d
Story: #2002586
Task: #24285

.zuul.yaml

@@ -0,0 +1,3 @@
+- project:
+    templates:
+      - openstack-specs-jobs

doc/source/index.rst

@@ -6,11 +6,14 @@ Barbican Project Specifications
 
 Stein approved specs:
 
-.. toctree::
-   :glob:
-   :maxdepth: 1
-
-   specs/stein/*
+..
+  disabled to not break builds, once first spec is added,
+  this needs enabling.
+  .. toctree::
+     :glob:
+     :maxdepth: 1
+  
+     specs/stein/*
 
 Pike approved specs: