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.
Change-Id: Ic04b7e658e7755c8e66e47a84442a5f3c791fa78
46931b172c