Merge pull request #1439 in HDFFV/hdf5 from rank0_bcast to develop
* commit 'ab5fe769ab711f736238abc89ef215a6ecff5f7e':
HDFFV-10625 -- Implemented a process-0 read and then broadcast for collective read of full (HS_ALL), contiguous, atomic datasets by all the processes in the file communicator.
indent change
changed logic statement in if
Added chunking test, fixed issue with CX set
Correct another git merge failure.
Correct misplaced line from git merge.
Updated and refined version of Scot's "rank 0 bcast" changes.
