@Override
  public void close() {
    longRunningStatusPollingThreadPool.shutdownNow();
  }
Concrete implementation of {@link ClusterManagementServiceTransport} which uses Spring's
{@link RestTemplate} for communication between client and CMS endpoint.
geode-management/src/main/java/org/apache/geode/management/api/RestTemplateClusterManagementServiceTransport.java