hdf5_ep

Merge pull request #1419 in HDFFV/hdf5 from ~JAKE.SMITH/hdf5:dset_ohdr_minimize_110 to hdf5_1_10

Minimized dataset object headers

* commit 'e1d865a11d7864f4c0733aa22a8c96f0f015ef75':
  Remove "bad" statements from end of TEST_ERROR.     Formerly arguments to FAIL_PUTS_ERROR.
  Add semicolon at end of TEST_ERROR() invocation for consistency.
  Change FAIL_PUTS_ERROR to TEST_ERROR. Remove VOL-related merge cruft.
  Change H5Dcreate() to H5Dcreate2(). Fix return value (int -> void).
  Change H5Acreate to H5Acreate2
  Remove unnecessary s
  Incoporate minimized dataset headers code and tests.