vchoi_fork

[svn-r19646] 
Replaced calls to H5Dcreate() and H5Acreate() with calls to H5Dcreate2()
and H5Acreate2() respectively in t_mdset.c.

This was done to repair a compile failure that occured on a build
with the --with-default-api-version=v16 config option

Cursory commit test