Add new role `ceph-defaults`

Add a new role `ceph-defaults`.
This role aims to handle all defaults vars for `ceph-docker-common` and
`ceph-common` and set basic facts (eg. `fsid`)

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

roles/ceph-defaults/meta/main.yml

@@ -0,0 +1,13 @@
+---
+galaxy_info:
+  author: Sébastien Han
+  description: Handles ceph-ansible default vars for all roles
+  license: Apache
+  min_ansible_version: 1.7
+  platforms:
+    - name: Ubuntu
+      versions:
+        - trusty
+  categories:
+    - system
+dependencies: []