title: How to set a never expired refresh token for uaa (or gateway?)
body: <p>Created a gateway to serve restful api, it does not depend on cookie, now want to configure a never expired refresh token so that mobile app users do not need to input username/password repeat. </p>
  
  <p>Found the refresh-token-validity-in-seconds-for-remember-me parameter in application-xxx.yml which is set to 7 days for dev profile, how to set a never expired refresh token?</p>