Changed HDF5_test_file_generator from using C++ HDF5 library to using C HDF5 library. Deleted Big endian test dataset as Native datatypes are in use in HDF loader and writer.
Changed HDF5_test_file_generator from using C++ HDF5 library to using C HDF5 library. Deleted Big endian test dataset as Native datatypes are in use in HDF loader and writer.

percival-detector/cppprocessing,percival-detector/cppprocessing