LU-6627 llite: remove extraneous export parameter

LU-6627 llite: remove extraneous export parameter

The ll_close_inode_openhandle() and ll_md_close() functions passed an
extra "obd_export *md_exp" parameter, but it turns out that all of the
callers already pass inode->i_sb->s_fs_info->lsi_llsbi->ll_md_exp in
one form or another, so it can just be extracted from "inode" directly
as needed.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Id9c841b11e05d2d16845998ec3f4e09fdf3ebbe5
Reviewed-on: http://review.whamcloud.com/14953
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Frank Zago <fzago@cray.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>