Change Details

Usage of #service-template-node has started to pick up, which means we have services with a common underlying architecture which need to be deployed on the SCA cluster. As this deployment requires quite a few [manual steps](https://www.mediawiki.org/wiki/Services/Meetings/2015-03-19-Ops), the first obvious step is to have a unified Puppet module which would take care of setting up these common things.