Minimal porting to PV4.1: update VTK version from 6.0 to 6.1
Minimal porting to PV4.1: update VTK version from 6.0 to 6.1

FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui