hdf5_msb

[svn-r6741] Purpose:
code cleanup.

Description:
Rename test_comm_info_delete to test_fapl_mpio_dup to better decribe
what it does.  Updated the comments to describe more accurate.

Platforms tested:
Did not run h5commmittest since the changes were all in parallel area.
Ran parallel tests on modi4 and eirene.

Misc. update: