LU-5017 mdd: Do not miss flags when do "lfs mv"

la_flags is missing in obdo_from_la and la_from_obdo, so
flags can not be set correctly during migration.

Add test cases in sanity 230b.

Signed-off-by: wang di <di.wang@intel.com>
Change-Id: Ia2665f3362323337e55618614964ead4f2c740a2
Reviewed-on: http://review.whamcloud.com/10240
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>