use a fresh appdata factory in background job test

Signed-off-by: Robin Appelman <robin@icewind.nl>

tests/lib/Preview/BackgroundCleanupJobTest.php

@@ -25,6 +25,7 @@ namespace Test\Preview;
 use OC\Files\AppData\Factory;
 use OC\Preview\BackgroundCleanupJob;
 use OC\PreviewManager;
+use OC\SystemConfig;
 use OCP\Files\IRootFolder;
 use OCP\IDBConnection;
 use Test\Traits\MountProviderTrait;
@@ -77,7 +78,10 @@ class BackgroundCleanupJobTest extends \Test\TestCase {
 		$this->trashEnabled = $appManager->isEnabledForUser('files_trashbin', $this->userId);
 		$appManager->disableApp('files_trashbin');
 
-		$this->appDataFactory = \OC::$server->query(Factory::class);
+		$this->appDataFactory = new Factory(
+			\OC::$server->getRootFolder(),
+			\OC::$server->getSystemConfig()
+		);
 		$this->connection = \OC::$server->getDatabaseConnection();
 		$this->previewManager = \OC::$server->getPreviewManager();
 		$this->rootFolder = \OC::$server->getRootFolder();