graph_editor_ui_test: fix running QUnit Tests

At the beginning of tests, there is Tests completed in {a few milliseconds}, so
this was reporting success before the test even run.

bt5/erp5_graph_editor_ui_test/PathTemplateItem/portal_tests/graph_editor_zuite/testQunit.zpt

@@ -13,7 +13,11 @@ Run existing qunit test in zelenium framework, to easily integrate it in current
   <td tal:content="string:${context/portal_url}/dream_graph_editor/jsplumb/test.html"></td>
   <td></td>
 </tr>
-
+<tr>
+  <td>waitForTextPresent</td>
+  <td>Running</td>
+  <td></td>
+</tr>
 <tr>
   <td>waitForTextPresent</td>
   <td>Tests completed in </td>