heartbeat: Fix topic name

source/RobotAPI/drivers/HokuyoLaserUnit/HokuyoLaserUnit.cpp

@@ -77,7 +77,7 @@ void HokuyoLaserUnit::onInitComponent()
 
 void HokuyoLaserUnit::onConnectComponent()
 {
-    robotHealthTopic = getTopic<RobotHealthInterfacePrx>(getProperty<std::string>("LaserScannerTopicName").getValue());
+    robotHealthTopic = getTopic<RobotHealthInterfacePrx>(getProperty<std::string>("RobotHealthTopicName").getValue());
     topic = getTopic<LaserScannerUnitListenerPrx>(topicName);
 
     if (task)