Add initial in-repo Zuul jobs

This change ensures parity with the CI jobs run by TravisCI on the
legacy StackHPC github repo.

In addition to the system-required job in infra project-config, the
following jobs are run on check and gate:

- openstack-tox-pep8
- openstack-tox-py27
- build-openstack-sphinx-docs
- kayobe-tox-ansible-syntax
- kayobe-tox-ansible

Ansible molecule tests are not working currently, as they require docker
engine to be running.

Change-Id: Ie95bcdaabb10ab661bc3a01efbaf9143896d6913
Story: #2001637
Task: #6646

zuul.d/jobs.yaml

@@ -0,0 +1,14 @@
+---
+# Tox job that checks Ansible playbook syntax.
+- job:
+    name: kayobe-tox-ansible-syntax
+    parent: openstack-tox
+    vars:
+      tox_envlist: ansible-syntax
+
+# Tox job that runs native Ansible role tests.
+- job:
+    name: kayobe-tox-ansible
+    parent: openstack-tox-with-sudo
+    vars:
+      tox_envlist: ansible

zuul.d/project.yaml

@@ -0,0 +1,21 @@
+---
+- project:
+    check:
+      jobs:
+        - openstack-tox-pep8
+        - openstack-tox-py27
+        # FIXME(mgoddard): python 3.5 jobs currently failing.
+        - openstack-tox-py35:
+            voting: false
+        - build-openstack-sphinx-docs
+        - kayobe-tox-ansible-syntax
+        - kayobe-tox-ansible
+
+    gate:
+      queue: kayobe
+      jobs:
+        - openstack-tox-pep8
+        - openstack-tox-py27
+        - build-openstack-sphinx-docs
+        - kayobe-tox-ansible-syntax
+        - kayobe-tox-ansible