LU-3079 osd-zfs: Change header order to avoid build fail

LU-3079 osd-zfs: Change header order to avoid build fail

SPL redefined list_move_tail() in sys/list.h. It will
confused if system & lustre header use list_move_tail()
after SPL header.

Signed-off-by: yang sheng <yang.sheng@intel.com>
Change-Id: I946e810b57affdeedbfc16bb5e502ebde0716039
Reviewed-on: http://review.whamcloud.com/6968
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>