hdf5_chunking_query_bmr

Merge pull request #516 in HDFFV/hdf5 from ~BYRN/hdf5_adb:develop to develop

* commit '56c3ec98207bb6c4b3e6a7b9523c2a1e849879c3':
  HDFFV-10128 add test to check null term Test is another dataset
  HDFFV-10128 Fix null term strings