LU-10405 lov: fill no-extent fiemap on object with no stripe.

LU-10405 lov: fill no-extent fiemap on object with no stripe.

This is useful for cp of large sparse files with no stripe info,
as cp relies on fiemap to detect what to read.

Add test 130f: fiemap for unstriped file

Change-Id: I12802c5b1cdec6baf5ee3cec6c706d92d9be4f63
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Reviewed-on: https://review.whamcloud.com/30591
Tested-by: Jenkins
Reviewed-by: Quentin Bouget <quentin.bouget@cea.fr>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>