message: integration_tests: try to fix PX4 losing datalink
  That's just a try to prevent PX4 from going into failsafe right after
  takeoff.
diff: @@ -46,14 +46,15 @@ void takeoff_and_hover_at_altitude(float altitude_m)
  [telemetry]() { return telemetry->health_all_ok(); }, std::chrono::seconds(10)));
  auto action = std::make_shared<Action>(system);
  - Action::Result action_ret = action->arm();
  - EXPECT_EQ(action_ret, Action::Result::Success);
  EXPECT_EQ(Action::Result::Success, action->set_takeoff_altitude(altitude_m));
  auto takeoff_altitude_result = action->get_takeoff_altitude();
  EXPECT_EQ(takeoff_altitude_result.first, Action::Result::Success);
  EXPECT_FLOAT_EQ(takeoff_altitude_result.second, altitude_m);
  + Action::Result action_ret = action->arm();
  + EXPECT_EQ(action_ret, Action::Result::Success);
  +
  action_ret = action->takeoff();
  EXPECT_EQ(action_ret, Action::Result::Success);
  