obo: add special rgw flags to put obj

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
obo: pass rgwx-* args when deleting object

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
obo: copy command

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>