HOR-4415 PHP Fatal error: Call to undefined method stdClass::equalCronFileTo()

- Add field PLUGIN_CRON_FILES in table PLUGINS_REGISTRY and fix external step in running cases

workflow/engine/data/mysql/schema.sql

@@ -3181,6 +3181,7 @@ CREATE TABLE `PLUGINS_REGISTRY`
 	`PLUGIN_CSS` MEDIUMTEXT,
 	`PLUGIN_JS` MEDIUMTEXT,
 	`PLUGIN_REST_SERVICE` MEDIUMTEXT,
+	`PLUGIN_CRON_FILES` MEDIUMTEXT,
 	`PLUGIN_TASK_EXTENDED_PROPERTIES` MEDIUMTEXT,
 	`PLUGIN_ATTRIBUTES` MEDIUMTEXT,
 	PRIMARY KEY (`PR_UID`)