LU-7115 fld: don't retry for no LWP device

LU-7115 fld: don't retry for no LWP device

Just try again for LWP import since other client
import may run into deadloop.

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: If1759b5ad7daa06abe6231669ad92e006ecb3059
Reviewed-on: https://review.whamcloud.com/17041
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>