title: JSF 2.2 Facelet taglib not found for passthrough attribute
body: <p>I am trying to use placeholders from HTML5 but I am getting a warning when including the taglib:</p>
  
  <pre><code>xmlns:pt="http://xmlns.jcp.org/jsf/passthrough"
  </code></pre>
  
  <p>The warning is saying it cannot locate the tag library</p>
  
  <pre><code>NLS missing message: CANNOT_FIND_FACELET_TAGLIB in: 
  org.eclipse.jst.jsf.core.validation.internal.facelet.messages
  </code></pre>
  
  <p>But when using the following tag anyway</p>
  
  <pre><code>&lt;h:inputText class="box" pt:placeholder="Message"/&gt;
  </code></pre>
  
  <p>This does actually render the placeholder (when not using eclipse inbuilt browser) so the tag library appears to be there.</p>
  
  <p>I am wondering is there either a way to disable this warning or preferably force eclipse to find the library? Having looked about for a solution I've seen that it may be an issue with JSF Mojarra 2.2 but I can't seem to update it to the latest (2.25 I think) in eclipse.</p>