Update 100-monitor_openvz.inc.php
PHP Warning: Use of undefined constant openvz_tools - assumed 'openvz_tools' (this will throw an Error in a future version of PHP) in /usr/local/ispconfig/server/lib/classes/cron.d/100-monitor_openvz.inc.php on line 72.
PHP Warning: Use of undefined constant openvz_tools - assumed 'openvz_tools' (this will throw an Error in a future version of PHP) in /usr/local/ispconfig/server/lib/classes/cron.d/100-monitor_openvz.inc.php on line 101.