RoverLandDetector: move static hysteresis configuration to constructor

src/modules/land_detector/RoverLandDetector.cpp

@@ -44,6 +44,11 @@
 namespace land_detector
 {
 
+RoverLandDetector::RoverLandDetector()
+{
+	_landed_hysteresis.set_hysteresis_time_from(true, 500_ms);
+}
+
 bool RoverLandDetector::_get_ground_contact_state()
 {
 	return true;
@@ -75,9 +80,4 @@ bool RoverLandDetector::_get_landed_state()
 	return !_armed;  // If we are armed we are not landed.
 }
 
-void RoverLandDetector::_set_hysteresis_factor(const int factor)
-{
-	_landed_hysteresis.set_hysteresis_time_from(true, 500_ms);
-}
-
 } // namespace land_detector

src/modules/land_detector/RoverLandDetector.h

@@ -52,13 +52,13 @@ namespace land_detector
 class RoverLandDetector : public LandDetector
 {
 public:
-	RoverLandDetector() = default;
+	RoverLandDetector();
 	~RoverLandDetector() override = default;
 
 protected:
 	bool _get_ground_contact_state() override;
 	bool _get_landed_state() override;
-	void _set_hysteresis_factor(const int factor) override;
+	void _set_hysteresis_factor(const int factor) override {};
 
 private:
 	uORB::Subscription _vehicle_global_position_sub{ORB_ID(vehicle_global_position)};