hdf5_ep

[svn-r16929] Bug 948:
Skipped the test of
     TESTING $H5DIFF -v $SRCFILE9 $SRCFILE10
     TOOLTEST h5diff_100.txt -v $FILE9 $FILE10 
again because they still hanged.
Do not turn it back on until it is proven fixed.
Also, want to verify if this is the only tests that hang or
if other tests may hang or if any non-thg machines may hang.

Tested:
jam-pp since it is a simple shell-script change.