Added fields to backup file (#684)

Author: mdjnelson

backup/moodle2/backup_customcert_stepslib.php

@@ -41,8 +41,9 @@ protected function define_structure() {
         // The instance.
         $customcert = new backup_nested_element('customcert', ['id'], [
             'templateid', 'name', 'intro', 'introformat', 'requiredtime', 'verifyany',
-            'deliveryoption', 'emailstudents', 'emailteachers', 'emailothers',
-            'protection', 'language', 'timecreated', 'timemodified']);
+            'deliveryoption', 'usecustomfilename', 'customfilenamepattern', 'emailstudents',
+            'emailteachers', 'emailothers', 'protection', 'language', 'timecreated',
+            'timemodified']);
 
         // The template.
         $template = new backup_nested_element('template', ['id'], [