Fix ojs-run-scheduled to call autoStage.xml

[marcbria]

ojs-run-scheduled is called by cron and is running "/var/www/html/tools/runScheduledTasks.php" without any parameters.

To process logs and show statistics it need to be: $ php /var/www/html/tools/runScheduledTasks.php /var/www/html/plugins/generic/usageStats/scheduledTasksAutoStage.xml

(not sure if full path is required for the xml file path)