refactoring smart pointers

src/GridGenerator/StreetPointFinder/StreetPointFinder.cpp

src/GridGenerator/StreetPointFinder/StreetPointFinder.h

src/Traffic/OneWayRoad.cpp

src/Traffic/OneWayRoad.h

src/Traffic/OneWayRoadSSJ.cpp

src/Traffic/OneWayRoadSSJ.h

src/Traffic/RoadMaker.cpp

src/Traffic/RoadMaker.h

src/Traffic/RoadNetworkData.h

targets/apps/LBM/TrafficTest/CMakeLists.txt

targets/apps/LBM/TrafficTest/TrafficTest.cpp