title: Show all failed tests of multiple test suite in one testNG report
body: <p>Actually I'm testing multiple website for my company. All the website have the same structure and i'm testing various things on each. </p>
  
  <p>For my test i have a Selenium Java Maven project using TestNG. For each web site, i've created a sub folder and generate a specific testing.xml file to specify each test i'm doing for the website.</p>
  
  <p>Here the structure : <a href="http://imgur.com/g0VHfMw" rel="nofollow">http://imgur.com/g0VHfMw</a></p>
  
  <p>My testing.xml files are like this :</p>
  
  <pre><code>  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
    &lt;!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd"&gt;
    &lt;suite name="Test suite website 1" parallel="tests" thread-count="2"&gt;
      &lt;test name="Test1"&gt;
        &lt;classes&gt;
          &lt;class name="package.for.mytest1"&gt;&lt;/class&gt;
        &lt;/classes&gt;
      &lt;/test&gt;
      &lt;test name="Test2"&gt;
        &lt;classes&gt;
          &lt;class name="package.for.mytest2"&gt;&lt;/class&gt;
        &lt;/classes&gt;
      &lt;/test&gt;
      &lt;test name="Test3"&gt;
        &lt;classes&gt;
          &lt;class name="package.for.mytest3"&gt;&lt;/class&gt;
        &lt;/classes&gt;
      &lt;/test&gt;
   &lt;/suite&gt;
  </code></pre>
  
  <p>How can I merge this 4 test suite in one testNG report ? And if it's possible, is there a way to only show the unstable or failed test on it ? </p>
  
  <p>Any ideas ? Thanks for your help </p>