hdf5

Merge pull request #1246 in HDFFV/hdf5 from ~BYRN/hdf5_adb:develop to develop

* commit '96d5da7f1ad681573d42d2a4fd9e422fe049442d':
  Remove extra unneeded
  Remove libsettings from pregenerated block
  Correct $withval usage in configure
  HDFFV-10332 Adjust checks and generation of files
  HDFFV-10332 Use pre-generated files