fix centreon/ndo - implements default sort field

Tested against centreon 2.1.13 (on premises), 2.4.0 (on premises) and 2.4.2 (demo.centreon)

Autologin key tested with 2.4.0

2.1.13 uses centreon old /xml/serviceXML.php
2.4.0 uses ndo, and /xml/ndo/
2.4.2 uses broker

Tested in OSX 10.6 and Windows 7.