Luxid was not handled in start_master() and stop_master() at all. As a result,
during a master-failover, luxid would be left running on the old master and
would not start on the new master, leaving the cluster without management until
luxid was manually started.

Signed-off-by: Apollon Oikonomopoulos <apoikos@gmail.com>
Signed-off-by: Michele Tartara <mtartara@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>