hdf5_ep

[svn-r6978] Purpose:
Bug fix.

Description:
The default setting of max transfer size is larger than
the default setting of number of bytes per process, result
in complaints that Transfer size is too big.

Solution:
Cap the min and max transfer size with number of bytes per process.
Always cap min transfer size with the max xfer size.

Platforms tested:
Copper.

Misc. update: