Changed mds_lov_set_nextid mds_lov_set_growth to use obd_set_info

Changed mds_lov_set_nextid mds_lov_set_growth to use obd_set_info
instead of obd_setattr, and added this code to lov_ and osc_set_info.
It is now ok if stripe_cnt  != target_cnt.

Removed the mds_lov_lsm, lsmsize fields, as they are no longer
needed now that we use obd_set_info.

Renamed lov_create_orphans to lov_clear_orphans, as that is what it does.

Fixed filter_next_id() and filter_last_id() to really be next and
last. (I take "last" to mean last value that filter_next_id()
returned.)

Added some tests to replay_single.sh.