hdf5

Merging in latest from upstream (HDFFV/hdf5:refs/heads/develop)

* commit '593e4038b3ab474a47e468bb3478d4ae3a6820e6':
  Fix for daily test failure Fix for the compilation error from the PGI compiler.
  Modifications based on comments from pull request review (1) Remove unnecessary asserts (2) Add code to insert bad offset values to the test file in gen_bad_offset.c
  HDFFV-10188 force non-native type description
  HDFFV-10188 emu insists on printing non-native description
  Fix for HDFFV-10216 segfault in H5G_node_cmp3 with corrupt h5 file Fix H5HL_offset_into() to return error when offset exceeds heap data block size. Also fix other places that call this routine to detect error return.
  HDFFV-10188 fix typo
  HDFFV-10188 add missing copy commands
  HDFFV-10188 Add tests and files
  HDFFV-10188 enable null space test
  HDFFV-10188 add release note
  HDFFV-10188 - Check for empty string first
  HDFFV-10188 error on NULL dataspace