rados-tool: use init_with_config interface
rados-tool: use init_with_config interface

Programs that use both librados and common_init should use
init_with_config.

Signed-off-by: Colin McCabe <7b35906f1d014e74a9dc8c913eb229119df647aa@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph