title: None required PathVariable not working
body: <p>I got the following code:</p>
  
  <pre><code>@GetMapping(value = "/user/{username}/{auth_key}", produces = MediaType.APPLICATION_JSON_VALUE)
  public ProfileRequest getUser(final @PathVariable("username") String username,
                                final @PathVariable(value = "auth_key", required = false) UUID authKey) {
  </code></pre>
  
  <p>and I can't understand why /user/{username} does not handle my request.</p>
  
  <p>Mfg.</p>