message: integration_tests: improve LogInfos
diff: @@ -37,11 +37,12 @@ TEST_F(SitlTest, MissionAddWaypointsAndFly)
  Device &device = dc.device();
  while (!device.telemetry().health_all_ok()) {
  - LogInfo() << "waiting for device to be ready";
  + LogInfo() << "Waiting for device to be ready";
  std::this_thread::sleep_for(std::chrono::seconds(1));
  }
  LogInfo() << "Device ready, let's start";
  + LogInfo() << "Creating and uploading mission";
  std::vector<std::shared_ptr<MissionItem>> mission_items;
  @@ -87,6 +88,7 @@ TEST_F(SitlTest, MissionAddWaypointsAndFly)
  MissionItem::CameraAction::STOP_PHOTO_INTERVAL));
  {
  + LogInfo() << "Uploading mission...";
  // We only have the send_mission function asynchronous for now, so we wrap it using
  // std::future.
  auto prom = std::make_shared<std::promise<void>>();
  @@ -95,26 +97,31 @@ TEST_F(SitlTest, MissionAddWaypointsAndFly)
  mission_items, [prom](Mission::Result result) {
  EXPECT_EQ(result, Mission::Result::SUCCESS);
  prom->set_value();
  + LogInfo() << "Mission uploaded.";
  });
  future_result.wait();
  future_result.get();
  }
  + LogInfo() << "Arming...";
  const Action::Result arm_result = device.action().arm();
  EXPECT_EQ(arm_result, Action::Result::SUCCESS);
  + LogInfo() << "Armed.";
  // Before starting the mission, we want to be sure to subscribe to the mission progress.
  // We pass on device to receive_mission_progress because we need it in the callback.
  device.mission().subscribe_progress(std::bind(&receive_mission_progress, _1, _2, &device));
  {
  + LogInfo() << "Starting mission.";
  auto prom = std::make_shared<std::promise<void>>();
  auto future_result = prom->get_future();
  device.mission().start_mission_async(
  [prom](Mission::Result result) {
  EXPECT_EQ(result, Mission::Result::SUCCESS);
  prom->set_value();
  + LogInfo() << "Started mission.";
  });
  future_result.wait();
  @@ -131,7 +138,7 @@ TEST_F(SitlTest, MissionAddWaypointsAndFly)
  LogInfo() << "in air";
  }
  - LogInfo() << "Landed, exiting.";
  + LogInfo() << "Disarmed, exiting.";
  }
  std::shared_ptr<MissionItem> add_mission_item(double latitude_deg,
  