The logics of handling the geometry file for simulation has changed. The variables...

The logics of handling the geometry file for simulation has changed. The variables and methods have been moved from galice.root / AliRun into AliSimulation. The interface is the same, but a single variable is used, the name of the file. If blank, the geometry is created, if the filename is "*OCDB*" the geometry is read from OCDB and any other string is interpreted as a filename to be read.