added background job

<?php

declare(strict_types=1);

/**

 * @copyright Copyright (c) 2016, ownCloud, Inc.

 *

 * @author Joas Schilling <coding@schilljs.com>

 *

 * @license AGPL-3.0

 *

 * This code is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Affero General Public License, version 3,

 * as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU Affero General Public License for more details.

 *

 * You should have received a copy of the GNU Affero General Public License, version 3,

 * along with this program.  If not, see <http://www.gnu.org/licenses/>

 *

 */

namespace OCA\EcloudAccounts\BackgroundJob;