hdf5_ep

[svn-r23055] Bug fix: HDFFV-8233
testh5stat.sh fails in LLNL uDawn. The test actually ran as expected
but it did not prepare for the extra error messages from the MPI
process.

Solution:
This sort of problem has been fixed by using the output filters in
output_filter.sh. testh5stat.sh is updated to use the output filters.

Tested:
uDawn.