DAOS-VOL

Merge pull request #149 in HDF5VOL/daos-vol from ~JHENDERSON/daos-vol:master to master

* commit '3a59f04a7d6523381a3a7bf98a3d5a1bfe0424b2':
  Fix typo in dataset write error message
  Broadcast global pool connection info when rank 0 creates a pool
  Add error message for when DUNS is not supported on file system
  Ensure that an IOD gets initialized in attribute deletion code path