rgw: enable data sending via http client

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: forward request params through upstream REST

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: determine owner after effetctive user

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: propagate region on bucket creation

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