REFAC: remove const char* SetFilename overloads

Modules/IO/ImageIO/include/otbImageFileReader.h

Modules/IO/ImageIO/include/otbImageFileReader.hxx

Modules/IO/ImageIO/include/otbImageFileWriter.h

Modules/IO/ImageIO/include/otbImageFileWriter.hxx

Modules/IO/ImageIO/include/otbImageSeriesFileReaderBase.h

Modules/IO/ImageIO/include/otbImageSeriesFileReaderBase.hxx

...s/MPI/MPITiffWriter/include/otbSimpleParallelTiffWriter.h

...MPI/MPITiffWriter/include/otbSimpleParallelTiffWriter.hxx

Modules/MPI/MPIVrtWriter/include/otbMPIVrtWriter.h

Modules/MPI/MPIVrtWriter/include/otbMPIVrtWriter.hxx

.../Visualization/MonteverdiCore/src/mvdVectorImageModel.cxx