hdf5_ep

Merge pull request #728 in HDFFV/hdf5 from ~BYRN/hdf5_adb:hdf5_1_8 to hdf5_1_8

* commit 'fb3ce2f3a1d72fd2b36aaf5c17c884ac673a1dda':
  HDFFV-10297 fix grammar
  HDFFV-10297 - clarify note.
  HDFFV-10297 Update release note
  Fix test DEPENDS