Set initial metadata cache configuration
H5P.set_mdc_config(plist_id,config_struct)
H5P.set_mdc_config(plist_id,config_struct) sets
the initial metadata cache configuration in the indicated file access
property list to the supplied values. Before using this function,
you should retrieve the current configuration using H5P.get_mdc_config.
Many of the fields in the structure, config_struct,
are intended to be used only in close consultation with the HDF5 Group
itself.