use the @cloudron/superagent module

src/routes/test/provision-test.js

@@ -10,7 +10,7 @@ const common = require('./common.js');
 const appstore = require('../../appstore.js'),
     expect = require('expect.js'),
     nock = require('nock'),
-    superagent = require('../../superagent.js'),
+    superagent = require('@cloudron/superagent'),
     timers = require('timers/promises');
 
 const DOMAIN = 'example-server-test.com';