title: ehcache exception when starting play 2.1 in PROD mode
body: <p>I'm using the play default cache in my application. When I try running my play 2.1 application using the target/start command on a server I get this error message:</p>
  
  <p>net.sf.ehcache.CacheException: Caches cannot be added by name when default cache config is not specified in the config. Please add a default cache config in the configuration.</p>
  
  <p>Works fine in dev mode. Is there somewhere I need to specify a default cache?  </p>