metadata validation

If you using metadata synchronization for example with Edugain you may get problem if metadata is extended with ws-fed
As workaorund  you define in config_rr.php different xsd as schema to be used for validation.
By defaul jagger uses saml-schema-metadata-2.0.xsd 
Optionaly you can set in config_rr.php
$config['rootSchemaFile'] = 'ws-federation.xsd';