hdf5_ep

[svn-r2974] Purpose:
    Code bullet-proofing
Description:
    There were several hard-coded values in various places in this test and
    it wasn't checking for out-of-memory conditions very robustly.
Solution:
    Changed hard-coded values to be computed values and performed better
    checking for out-of-memory situations.
Platforms tested:
    SGI O2K (modi4) and Solaris 2.6 (baldric)