hdf5_ep

Merge pull request #2178 in HDFFV/hdf5 from ~BYRN/hdf5_adb:develop to develop

* commit 'b6bc749eac68335004ad80edc0f4e28322631d15':
  Grep needs to search error file
  Correct flaws in test scripts and files
  grep for failure text in error stack
  Add list to function arg
  Test files for new ref types
  h5diff test script files
  Add ref changes to test script