Comment 0 for bug 1510551

We need to describe how to install seed server from puppet manifests.
This server store iso files which are used by systest jobs, it is required by CI.

Please describe:
- system requirements for seed
- how to install seed server from puppet manifests, describe changes required in hiera and on puppet server
- other changes required to use it

This is part of work required by https://mirantis.jira.com/browse/PROD-2143