 This method is called once an application
   * is no longer using a claimed resource in the shared cache. The client uses
   * a checksum to identify the resource and an {@link ApplicationId} to
   * identify which application is releasing the resource.
   * </p>
 This method is called once an application
   * is no longer using a claimed resource in the shared cache. The client uses
   * a checksum to identify the resource and an {@link ApplicationId} to
   * identify which application is releasing the resource.
   * </p> | ClientSCMProtocol.java