vchoi_fork

* Yanked the smoke check that was recently introduced to test
  the unused H5I_REFERENCE ID type in test_misc19(). This fails
  when running testhdf5 and skipping the reference test since
  the H5R package won't be initialized. H5I_REFERENCE will
  be going away soon and the ID type is unused so there's really
  no point to doing anything to test it.
* Cleaned up test_misc13(), which is a basic test of userblock
  functionality, to not emit warnings due to the large global
  array.