hdf5_ep

[svn-r7369] Purpose:
    Bug fix

Description:
    The metadata cache 'destroy' callback routines need the file handle in
order for certain callback routines (currently just the H5HG one) to perform
extra cleanups.  The recent change to call the 'destroy' callback from the
'clear' callback omitted this parameter.

Solution:
    Add the file handle to the metadata cache 'clear' callbacks.

Platforms tested:
    FreeBSD 4.8 (sleipnir)
    too small to need h5committest