LU-10887 lfsck: offer shard's mode when re-create it

LU-10887 lfsck: offer shard's mode when re-create it

The namespace will re-create the lost shard of a broken stripe
directory if "-C" option specified. Under such case, the @mode
parameter should be given properly.

Signed-off-by: Fan Yong <fan.yong@intel.com>
Change-Id: I2441d8ca83c932a34ef1971d334f54ecd7343b27
Reviewed-on: https://review.whamcloud.com/31915
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>