Update the tests of shared nodes to the new saveToDB helper function

GeoModelExamples/SharedNodes/shared_logvols.cpp

GeoModelExamples/SharedNodes/shared_nametags.cpp

GeoModelExamples/SharedNodes/shared_physvols.cpp

GeoModelExamples/SharedNodes/shared_serialtransformers.cpp

GeoModelExamples/SharedNodes/shared_serialtransformers_2.cpp

GeoModelExamples/SharedNodes/shared_serialtransformers_3.cpp

GeoModelExamples/SharedNodes/shared_shapes.cpp