hdf5_msb

[svn-r2973] Purpose:
    Bug fix, cleanup,...
Description:
    The test was doing the hyperslab select incorrectly (thinking
    count was the block length.
Solution:
    Fixed it to do the correct hyperslab selection.
    Changed it to calculate different data for different datasets.
    Changed output by rows instead by cols.  It tests the purpose
    of creating multiple datasets the same but runs faster.
Platforms tested:
    modi4-64.