Radosgw port from upstream (WIP)

1. This is not tested yet.

2. New comments (like 'this is from file XY") are for review only, will be removed


Depends on https://github.com/crowbar/barclamp-ceph/pull/56
I'm not sure if we don't have some different policy for directories. For example  nova_dashboard/recipes/server.rb creates this one only if node.platform != "suse"