title: Close all tabs of p:accordionPanel on page load
body: <p>Accordionpanel tabs are not closed when moving the second time to the page, even with 
  activeIndex="" the tabs are closed only the first time moving to the page.
  I'm using Primefaces 3.5 and MyFaces 2.1.5.</p>
  
  <pre><code>&lt;p:accordionPanel id="accordionServers" style="width:400px" multiple="true" activeIndex="" cache="false" dynamic="true"&gt;
  &lt;p:tab title="Tab1"&gt;&lt;/p:tab&gt;
  &lt;p:tab title="Tab2"&gt;&lt;/p:tab&gt;
  &lt;/p:accordionPanel&gt;
  </code></pre>
  
  <p>What is the simplest workaround?</p>