[releng] PR #7094: use the fedora-atomic-host.json file for ostree creation

[Mohan Boddu]

mohanboddu merged a pull-request against the project: `releng` that you are following.

Merged pull-request:

``
use the fedora-atomic-host.json file for ostree creation
``

https://pagure.io/releng/pull-request/7094