Fix phpunit issue from customfield_category with other plugin

Author: TomoTsuyuki

tests/datasource_userlist_test.php

@@ -125,7 +125,7 @@ public function check_database(object $importdata, int $itemid) {
 
         $categoryrecord = $DB->get_records(
             'customfield_category',
-            ['itemid' => $itemid]
+            ['itemid' => $itemid, 'component' => 'mod_cms']
         );
 
         $this->assertEquals(1, count($categoryrecord));