title: JSF 2.2 interpret empty string submitted values as null not working
body: <p>I have migrated from Java EE 6 to Java EE 7, and now with JSF 2.2 the context param <code>INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</code> seems not work. In JSF 2.1 I set it to "true" and it works perfectly, but now I get always blank strings.</p>
  
  <pre><code>&lt;context-param&gt;
      &lt;param-name&gt;javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL&lt;/param-name&gt;
      &lt;param-value&gt;true&lt;/param-value&gt;
  &lt;/context-param&gt;
  </code></pre>
  
  <p>Can anyone say something about it?</p>