LU-1876 hsm: revise ll_setattr_raw to not check stripe data

LU-1876 hsm: revise ll_setattr_raw to not check stripe data

It used to check if the file has stripe data, or it won't send file
size to the MDT. After layout lock is introduced, it's unreliable to
check stripe data at llite layer.

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: Ib947c568232b4025210d1e2e4e05bcf3514fd36a
Reviewed-on: http://review.whamcloud.com/5291
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: John Hammond <johnlockwoodhammond@gmail.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>