@Override
  public void close() {
    if (routerOpen.compareAndSet(true, false)) {
      shutDownExecutorService(operationPool, 1, TimeUnit.MINUTES);
    }
  }
Set the lifeVersion of this blob.
@param lifeVersion The lifeVersion to set.
ambry-test-utils/src/main/java/com/github/ambry/router/InMemoryRouter.java