[CORD-2338] Single command to run E2E tests

Change-Id: Id8db22b2b496ca16d20d2c4d0739d9b9042540db
diff --git a/e2e/test_helpers/user.js b/e2e/test_helpers/user.js
index 9a6f09a..11ac4f8 100644
--- a/e2e/test_helpers/user.js
+++ b/e2e/test_helpers/user.js
@@ -17,6 +17,7 @@
 
 
 const fs = require('fs');
+const path = require('path');
 const config = require('./config');
 const P = require('bluebird');
 
@@ -28,7 +29,7 @@
     return process.env.UI_PWD;
   }
 
-  const pwdFile = fs.readFileSync('../../build/platform-install/credentials/xosadmin@opencord.org', 'utf8');
+  const pwdFile = fs.readFileSync(path.join(__dirname, '../../../../build/platform-install/credentials/xosadmin@opencord.org'), 'utf8');
   return pwdFile;
 };