LU-709 build: cleanup LC_FLUSH_OWNER_ID/INVALIDATE_MAPPING

LU-709 build: cleanup LC_FLUSH_OWNER_ID/INVALIDATE_MAPPING

1. file_opeartions.flush takes fl_owner_t argument since v2.6.18
2. HAVE_INVALIDATE_MAPPING_PAGES and HAVE_INVALIDATE_INODE_PAGES
   are not used in Lustre

Signed-off-by: Peng Tao <tao.peng@emc.com>
Change-Id: I3674b032470973ee6b2be5bd05bb7ecc1311d107
Reviewed-on: http://review.whamcloud.com/2322
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>