title: Multiple <cc:insertChildren /> in the same composite component
body: <p>I'm trying to do a composite component with union of a autoComplete and a dataTable. Like this:</p>
  
  <pre><code>&lt;util:myCustomComp ...&gt;
      &lt;p:column&gt;#{item.code}&lt;/p:column&gt;
      &lt;p:column&gt;#{item.name}&lt;/p:column&gt;
  &lt;/util:myCustomComp&gt;
  </code></pre>
  
  <p>And in CC file:</p>
  
  <pre><code>&lt;p:autoComplete ...&gt;
      &lt;cc:insertChildren /&gt; &lt;!-- Show columns only in autocomplete --&gt;
  &lt;/p:autoComplete&gt;
  &lt;p:dataTable ...&gt;
      &lt;cc:insertChildren /&gt;
  &lt;/p:dataTable&gt;
  </code></pre>
  
  <p>But the second  isnt rendered, render only the first and skeep (in autoComplete or in dataTable).</p>
  
  <pre><code>&lt;p:autoComplete ... /&gt;
  &lt;p:dataTable ...&gt;
      &lt;cc:insertChildren /&gt; &lt;!-- Show columns in dataTable --&gt;
  &lt;/p:dataTable&gt;
  </code></pre>