Adds Magnum API Reference jobs to gate and check builds
Adds Magnum API Reference jobs to gate and check builds

- Since the files are truly skeletal now, don't publish to the web yet.

Change-Id: If9496c762beb45c22e8b55d3c25ab262ac2215a0

openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config