hdf5_ep

[svn-r6769] Purpose:
Minor improvement

Description:
Moved the H5FD_mpio_Debug initialization to H5FD_mpio_init() so
that it is done only once instead of every file open.

Fixed blocked out patch that checks on INFO object so that
H5FD_mpio_Debug can be set via the INFO object.

(All these had been done to v1.4, now folded them int v1.5)

Platforms tested:
Did not h5committest since this is purely parallel code.
The changes were made in an isolated copy in Copper.
Tested in Copper parallel.

Misc. update: