Initial Zuul v3 role jobs

This patch implements an initial set of jobs intended to match
the current job execution method. It does not intend to improve
how the jobs are executed - only to replicate what is currently
in openstack-infra/openstack-zuul-jobs and provide the platform
to iterate on.

Includes a backport of https://review.openstack.org/484229

Change-Id: Ia94e3f5d8398c914359d9df3cfc391712838dbab

tests/ansible-role-requirements.yml

@@ -2,6 +2,10 @@
   src: https://git.openstack.org/openstack/openstack-ansible-apt_package_pinning
   scm: git
   version: origin/stable/ocata
+- name: ceph_client
+  src: https://git.openstack.org/openstack/openstack-ansible-ceph_client
+  scm: git
+  version: origin/stable/ocata
 - name: pip_install
   src: https://git.openstack.org/openstack/openstack-ansible-pip_install
   scm: git

zuul.d/project.yaml

@@ -0,0 +1,25 @@
+---
+# Copyright 2017, Rackspace US, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- project:
+    name: openstack/openstack-ansible-os_ironic
+    check:
+      jobs:
+        - openstack-ansible-linters
+        - openstack-ansible-functional-ubuntu-xenial
+    gate:
+      jobs:
+        - openstack-ansible-linters
+        - openstack-ansible-functional-ubuntu-xenial