title: Grails Hibernate4 upgrade errors on getGeneratedKeys()
body: <p>I'm upgrading to the Hibernate4:4.3.5.3 plugin for Grails 2.3.9 . However, I'm getting an error:</p>
  
  <pre><code>getGeneratedKeys() support is not enabled
  </code></pre>
  
  <p>I haven't been able to find any configuration details on how to enable this.</p>