add ceph yum repository
add test for ceph yum repo
Merge pull request #17 from cernceph/yum

add ceph yum repository
Fix the box url again.
mon data directory is no longer automatically created.
Made the mon_data_real path explicit and added a file resource to create the directory after keyring creation
Merge pull request #3 from dontalton/mon_path

Add mon path fix to allow cuttlefish deployment