message: Disables 'convert_sidre_protocol' utility when hdf5 disabled.
  This utility converts from the 'sidre_hdf5' protocol to other protocols
  and is not relevant without hdf5.
diff: # convert_protocol is a utility that converts
  # a datastore from the sidre_hdf5 protocol
  # to any of the other supported protocols.
  -# It requires slam, sidre and mpi.
  +# It requires slam, sidre, mpi and hdf5.
  ##################################################
  -if( ENABLE_SLAM AND ENABLE_SIDRE AND ENABLE_MPI )
  +if( ENABLE_SLAM AND ENABLE_SIDRE AND ENABLE_MPI AND HDF5_FOUND )
  set(datastore_converter_sources
  convert_sidre_protocol.cpp
  )
  