Resolves: bug 485694
    Bug Description: Cross Platform Migration Fails with: Unable to access
    nsslapd-rundir: Bad address
    Reviewed by: nkinder (Thanks!)
    Fix Description: Need to add any new attributes added in 8.0 and 8.1 to
    the ignoreOld hash table in the migration script.  The way migration
    works, it assumes an attribute is supported in both the old version and
    the new version.  So if the attribute is absent in the old entry and
    present in the new entry, it assumes the user removed the attribute in
    the old entry, so removes it in the new entry.  The ignoreOld hash table
    holds the list of attributes that we should ignore for the purposes of
    attribute comparison.  These are the attributes we just want to pass
    through.
    Platforms tested: RHEL5
    Flag Day: no
    Doc impact: no