hdf5_ep

Merge pull request #1880 in HDFFV/hdf5 from ~BYRN/hdf5_adb:develop to develop

* commit '9081fb266cc15198e0c75a77f23f2b252c6ee79f':
  Add missing HD prefix
  This test cannot use HD prefix macro with printf of fprintf
  Update HD prefix and reconcile hl/cpp test
  Add HD prefix to tests