lustre/llite: Do not send parent dir fid in getattr by fid

Sending getattr by fid in this case is pointless, as the parent
might havelong changed and we have no control over it, but it's
irrelevant anyway, since we already have the child fid.

Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: http://review.whamcloud.com/7910
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3240


Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>