mavsdk tests: use tester sleep function

the original std::this_thread::sleep_for is with respect to host system
time which is different from autopilot time if speed factor != 1, if
some component runs slower than real time, or if debugging.
tester.sleep_for (which already existed) correctly sleeps w.r.t.
px4/simulation time.

test/mavsdk_tests/autopilot_tester.h

@@ -283,7 +283,11 @@ private:
 	}
 
 
+<<<<<<< HEAD
 	mavsdk::Mavsdk _mavsdk{Mavsdk::Configuration{ComponentType::GroundStation}};
+=======
+	mavsdk::Mavsdk _mavsdk{};
+>>>>>>> 5a03cfb986e (mavsdk tests: use tester sleep function)
 	std::unique_ptr<mavsdk::Action> _action{};
 	std::unique_ptr<mavsdk::Failure> _failure{};
 	std::unique_ptr<mavsdk::Info> _info{};