title: Cannot change version of project facet Dynamic Web Module to 3.0?
body: <p>I am using maven to create a dynamic webapp in Eclipse. I added some folders like <code>src/test/java</code> and <code>src/test/resources</code>. Also I changed the library in Java Build Path to obtain the JavaSE-1.7. It's all OK up to here.</p>
  
  <p>When I tried to change the Projects Facet Dynamic Web Module something  went wrong. I had change the Java to 1.7 in the same place. And it still told me, cannot change version of project facet Dynamic Web Module to 3.0.</p>
  
  <p>I have changed everything that would effect the changing I think.</p>