Add various bits of setup automation

Add ceph-setup role
Add automated osd preparation and configuration
Add mds setup automation

Resolves https://github.com/ceph/ceph-cookbooks/issues/56 and https://github.com/ceph/ceph-cookbooks/issues/48

Note: My testing is being done with dumpling. I can't guarantee this will work with anything more than an n-1 version.