replace delay.js with timers/promises

src/routes/test/provision-test.js

@@ -7,9 +7,9 @@
 
 const common = require('./common.js');
 
-const delay = require('../../delay.js'),
-    expect = require('expect.js'),
-    superagent = require('superagent');
+const expect = require('expect.js'),
+    superagent = require('superagent'),
+    timers = require('timers/promises');
 
 const DOMAIN = 'example-server-test.com';
 
@@ -27,7 +27,7 @@ describe('Provision', function () {
 
             if (response.status === 200 && !response.body.setup.active && response.body.setup.errorMessage === '' && response.body.adminFqdn) return;
 
-            await delay(4000);
+            await timers.setTimeout(4000);
         }
 
         throw new Error(`Setup did not complete. status: ${response.status} body: ${JSON.stringify(response.body)}`);