site: report ceph -s status at the end of the deployment

site: report ceph -s status at the end of the deployment

We now show the output of 'ceph -s'. Example output below:

TASK [display post install message] **********************************************************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": [
        "  cluster:",
        "    id:     753212df-f32a-4cc9-a097-2db6fe89a251",
        "    health: HEALTH_OK",
        " ",
        "  services:",
        "    mon: 1 daemons, quorum ceph-nano-lul-faa32aebf00b",
        "    mgr: ceph-nano-lul-faa32aebf00b(active)",
        "    osd: 1 osds: 1 up, 1 in",
        " ",
        "  data:",
        "    pools:   4 pools, 32 pgs",
        "    objects: 224 objects, 2546 bytes",
        "    usage:   1027 MB used, 9212 MB / 10240 MB avail",
        "    pgs:     32 active+clean",
        " "
    ]
}

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1602910
Signed-off-by: Sébastien Han <seb@redhat.com>