HOR-3979

Add PLUGIN_TASK_EXTENDED_PROPERTIES for plugins.

workflow/engine/data/mysql/schema.sql

@@ -3177,6 +3177,7 @@ CREATE TABLE `PLUGINS_REGISTRY`
 	`PLUGIN_CSS` MEDIUMTEXT,
 	`PLUGIN_JS` MEDIUMTEXT,
 	`PLUGIN_REST_SERVICE` MEDIUMTEXT,
+	`PLUGIN_TASK_EXTENDED_PROPERTIES` MEDIUMTEXT,
 	`PLUGIN_ATTRIBUTES` MEDIUMTEXT,
 	PRIMARY KEY (`PR_UID`)
 )ENGINE=InnoDB ;