LU-5823 llite: Remove access of stripe in ll_setattr_raw

LU-5823 llite: Remove access of stripe in ll_setattr_raw

In ll_setattr_raw(), it needs to know if a file is released
when the file is being truncated. It used to get this information
by accessing lov_stripe_md. This turns out not necessary. This
patch removes the access of lov_stripe_md and solves the problem
in lov_io_init_released().

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: I05b532fd137889d13e8ecb35585f4d1b09958583
Reviewed-on: http://review.whamcloud.com/13514
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Henri Doreau <henri.doreau@cea.fr>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>