Fix setting_example.php servicename parameter

Author: pitbulk

settings_example.php

@@ -34,7 +34,7 @@
         // attributeConsumingService. nameFormat, attributeValue and
         // friendlyName can be omitted. Otherwise remove this section.
         "attributeConsumingService"=> array(
-                "ServiceName" => "SP test",
+                "serviceName" => "SP test",
                 "serviceDescription" => "Test Service",
                 "requestedAttributes" => array(
                     array(