hdf5

Merge pull request #1926 in HDFFV/hdf5 from ~BYRN/hdf5_adb:develop to develop

* commit '8cddc96f73e8f90f67792405f5142b419e9061d7':
  Change unused variable to generic form
  Whitespace cleanup
  Add missing HD prefix
  HDFFV-10740 - skip copying dirs in for loops
  Correct HDF5 options to tristate values.
  HDFFV-10905 fix test scripts for no zlib
  HDFFV-10903 - fix VFD constants in JNI