hdf5

[svn-r20487] Bug 1386 - allow dimension size to be zero even though it isn't unlimited.  This is a follow-up checkin for 
r20440 and r20469:
  1. The dataspace code has another bug - when the maximal dimension isn't passed in for H5Sset_extent_simple, it
     is supposed to be same as the dimension.  The current library sets NULL to it.  I corrected it and added a
     test case to it.
  2. I corrected the tests of Fortran and C++ for this problem.

Tested on heiwa, jam, and amani.