hdf5_chunking_query_bmr

[svn-r27179] Merge 27162 & 27163 from trunk:

fix for HDFFV-9412:
- Check for mpi is_initialized and is_finalized before making MPI calls in init/terminate of HDF5.
- Add a test to make sure we can make serial HDF5 calls from rank 0 after MPI_Finalize is called.

tested with h5committest