update: import ceph-defaults role in first play

update: import ceph-defaults role in first play

Typical error:

```
fatal: [mon0]: FAILED! =>
  msg: |-
    The conditional check 'not delegate_facts_host | bool or inventory_hostname in groups.get(client_group_name, [])' failed. The error was: error while evaluating conditional (not delegate_facts_host | bool or inventory_hostname in groups.get(client_group_name, [])): 'client_group_name' is undefined
```

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 8138d4193c965a5c990c6c101ef7a9bf2e4080f7)