Add orchestration_data to releases if empty

We need to set orchestration_data manually if it doesn't exist in
openstack.yaml. It's a workaround of the issuee when we don't have
versioned puppers/repos on 5.0.1/5.1.

blueprint upgrade-to-5-0-1

Closes-Bug: #1336379

Change-Id: I9241753008338d3acbc9c4876ae4b70004ccda1c