Bug 732541 - Ignore error 32 when adding automember config
    
    When you add a new automember config entry, we validate it at the
    pre-op stage.  Part of this validation includes searching for child
    regex rule entries.  We use the config entry DN as the search base,
    but this fails when a new config entry is being added since it the
    entry doesn't yet exist at the pre-op phase.  This results in the
    new entry being considered invalid, which causes us to return an
    unwilling to perform error that blocks the config entry from
    being added.
    
    We can safely ignore a LDAP_NO_SUCH_OBJECT error when attempting
    to search for child regex rules.