hdf5_ep

Merge pull request #509 in HDFFV/hdf5 from ~VCHOI/my_hdf5_fork:hdf5_1_10 to hdf5_1_10

* commit '228939e7315cc9644e158fc246f4908301d77a35':
  Call to H5Dopen has H5dopen2 arguments at line 12704 of test/dsets.c - changed to H5Dopen2 to fix failure with --with-default-api-version=v16 configure option.