Add kubernetes-incubator/kubespray into zuul tenant
Add kubernetes-incubator/kubespray into zuul tenant

The k8s-sig would like to experiment with the idea of creating a base
job to install kubernetes.  By adding kubernetes-incubator/kubespray
to zuul's configuration, we'll be able to run their playbooks / roles
directly from a zuul-executor.

Change-Id: If2ea5f4211d1bca00e35b641e17f1e958079beb3
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config