message: Handle honeywell backend status
  Currently, we terminate if the backend is not online.
  This can be inconvenient for batch mode (vector<Composite>) since the backend can go into 'in maintenance' status.
  Hence, changed the logic to only terminate if the status is 'offline' (according to the calendar).
  Otherwise, try polling.
diff: @@ -167,13 +167,24 @@ void HoneywellAccelerator::execute(
  "Please specify a honeywell backend in your getAccelerator() call.");
  }
  auto qasm = getNativeCode(circuit);
  -
  - auto backend_status = get(url, "machine/"+backend, generateRequestHeader());
  + while (true) {
  + auto backend_status =
  + get(url, "machine/" + backend, generateRequestHeader());
  auto status_J = nlohmann::json::parse(backend_status);
  - if (status_J["state"] != "online") {
  - xacc::error("Cannot run on " + backend + ", it is not online.");
  + // xacc::info("\nHoneywell status:\n" + backend_status);
  + // If offline, terminate
  + if (status_J["state"] == "offline") {
  + xacc::error("Cannot run on " + backend + ", it is offline.");
  + }
  + // If online, continue to run
  + if (status_J["state"] == "online") {
  + break;
  + }
  + // If status = 'in maintenance', wait for a bit and try again
  + xacc::info("Honeywell is '" + std::string(status_J["state"]) +
  + "', waiting for a bit...");
  + std::this_thread::sleep_for(std::chrono::seconds(60));
  }
  -
  xacc::info("\nHoneywell sending qasm:\n" + qasm);
  nlohmann::json j;
  