init-radosgw*: fix status return value if radosgw isn't running

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
(cherry picked from commit b5137baf651eaaa9f67e3864509e437f9d5c3d5a)
Merge pull request #574 from dalgaaf/fix/da-dumpling-cherry-picks

init-radosgw*: fix status return value if radosgw isn't running

Reviewed-by: Sage Weil <sage@inktank.com>