title: RabbitMQ plugin configuration failure
body: <p>I have copied plugins to plugins folder in rabbitmq-server. </p>
  
  <p>When I run command to enable stomp plugin like the following:</p>
  
  <blockquote>
    <p>$rabbitmq-plugins enable rabbitmq_stomp</p>
    
    <p>Plugin configuration remains unchanged.</p>
    
    <p>Applying plugin configuration to rabbit@pts00449-vm19... failed.
    Error: {enabled_plugins_mismatch,"/etc/rabbitmq/enabled_plugins",
                                     "/does-not-exist"}</p>
  </blockquote>
  
  <p>Can anyone please help me?</p>