LU-8681 osd: ingore ENODATA during unlink agent parent

LU-8681 osd: ingore ENODATA during unlink agent parent

If the directory is created before 2.0, there are no LMA
for the directory, then osd_delete_from_remote_parent()
will return ENODATA. So we should ignore ENODATA in this
case otherwise it will cause unlink fails.

Lustre-commit: 860283cb433dff4246a5c255ed89325323ee8e7c
Lustre-change: http://review.whamcloud.com/16760

Signed-off-by: Wang Di <di.wang@intel.com>
Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Intel-bug-id: LDEV-64
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Change-Id: I728c081f324253080c5d2cb740b3a11b26f9d570
Reviewed-on: http://review.whamcloud.com/23030
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>