Add opendev/base-jobs to openstack tenant
Add opendev/base-jobs to openstack tenant

This is intended to replace some of the jobs in project-config.
It shadows project-config, which means none of the jobs should
take effect at first.  However, as we remove each job from
project-config, the job in base-jobs will take over.

Change-Id: I3e6ac99f5b00977c5be80c6a3906b1de96d77df4

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