code: @Test public void testBindingKeyIgnored(){
    KeyAuthenticationProperties props=new KeyAuthenticationProperties();
    RelaxedDataBinder binder=new RelaxedDataBinder(props,"shell.auth.key");
    binder.setConversionService(new DefaultConversionService());
    Map<String,String> map=new HashMap<String,String>();
    binder.bind(new MutablePropertyValues(map));
    assertFalse(binder.getBindingResult().hasErrors());
    Properties p=new Properties();
    props.applyToCrshShellConfig(p);
    assertNull(p.get("crash.auth.key.path"));
  }
  