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"Bug fix" Description: This version is showing very slow HDF5 I/O write speeds (about 40% of MPIO). It was because the library is writing fill values by default. There is a no-fill option which set to FALSE. Changed it to TRUE since MPIO and POSIX are not doing fill values. This is just a stop gap fix since the better fix would be to change the library to not write fill-values in this case. Platforms tested: modi4 parallel and LANL Q paralllel. No h5committest test because it is very trivia. Misc. update: