vchoi_fork

[svn-r11070] 
Purpose:
Make collective IO tests work with mpiposix

Description:
Although internally HDF5 is using independent IO for mpiposix driver,
it is still a good test to see whether HDF5 APIs can allow collective IO calls to pass
into mpiposix driver.
Previous tests ignore this test; now add it.

Solution:

Platforms tested:
AIX (copper), too minor to need to test with three platforms.

Misc. update: