migrate to "export default"

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

src/test/apps-test.js

@@ -3,11 +3,11 @@
 import apps from '../apps.js';
 import AuditSource from '../auditsource.js';
 import BoxError from '../boxerror.js';
-import * as common from './common.js';
+import common from './common.js';
 import expect from 'expect.js';
 import Location from '../location.js';
 import safe from 'safetydance';
-import * as users from '../users.js';
+import users from '../users.js';
 
 const { proxyApp } = common;