void verifyTrackingHeaders(HttpResponse response) {
    Assert.assertEquals("Unexpected or missing tracking header for datacenter name", DATA_CENTER_NAME,
        response.headers().get(RestUtils.TrackingHeaders.DATACENTER_NAME));
    Assert.assertEquals("Unexpected or missing tracking header for hostname", HOST_NAME,
        response.headers().get(RestUtils.TrackingHeaders.FRONTEND_NAME));
  }
Verify the tracking headers were attached to the response properly.
@param response the {@link HttpResponse} to be verified.
ambry-frontend/src/integration-test/java/com/github/ambry/frontend/FrontendIntegrationTestBase.java