hdf5_chunking_query_bmr

Fix HDFFV-8089
Description:
    Some code within an "ifdef H5D_CHUNK_DEBUG" block was using outdated
    data structure but not caught because the case of H5D_CHUNK_DEBUG being
    defined was never tested.  It was commented out.
    I defined H5D_CHUNK_DEBUG, tested, and commented out again.
Platforms tested:
    Linux/32 2.6 (jam)
    Linux/64 (platypus)
    Darwin (osx1010test)