migrate to "export default"

also, set no-use-before-define in linter

src/routes/test/provision-test.js

@@ -1,7 +1,7 @@
 /* global it:false */
 
 import common from './common.js';
-import * as appstore from '../../appstore.js';
+import appstore from '../../appstore.js';
 import expect from 'expect.js';
 import nock from 'nock';
 import superagent from '@cloudron/superagent';