vchoi_fork

[svn-r6834] Purpose:
Feature change

Description:
HDF5_PARAPREFIX has been default to various values like /tmp,
/var/tmp, ... None of these solve all problems and all of them
created new problems.  For LLNL GPFS, '.' is more appropriate since
they can do the build right inside gpfs.  Same for NCSA Copper.
The special setting for Janus is still retained since that is a
one of a kind machine and the uses could use all the help.

Platforms tested:
h5committested (using sol instead of arabica) plus eirene(pp).

Misc. update: