LU-4017 quota: add project id support to lfs find

LU-4017 quota: add project id support to lfs find

Project ID support is added into 'lfs find', which is
needed for sanity-quota.sh etc to collect project id information
if test failed

Change-Id: I60cfc4f81bb8779db0a33a5c9bae7255e9d0100c
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Reviewed-on: https://review.whamcloud.com/26464
Reviewed-by: Li Xi <lixi@ddn.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>