message: action: don't use std::cout in integration tests
diff: @@ -41,7 +41,7 @@ void takeoff_and_hover_at_altitude(float altitude_m)
  int iteration = 0;
  while (!telemetry->health_all_ok()) {
  - std::cout << "waiting for system to be ready" << std::endl;
  + LogInfo() << "waiting for system to be ready";
  std::this_thread::sleep_for(std::chrono::seconds(1));
  ASSERT_LT(++iteration, 10);
  @@ -66,7 +66,7 @@ void takeoff_and_hover_at_altitude(float altitude_m)
  iteration = 0;
  while (telemetry->in_air()) {
  - std::cout << "waiting for system to be landed" << std::endl;
  + LogInfo() << "waiting for system to be landed";
  std::this_thread::sleep_for(std::chrono::seconds(1));
  // TODO: currently we need to wait a long time until landed is detected.
  