changed load_ballance() function to
1. save profiles applied in the current iteration
2. process previous iteration's profiles to clean them up
3. allow group and/or resources list changes in subsequent calls
4. sanity check if dst_bitmap size chaged
add lb_reset() function to reset LB state in case you want to stop load-ballancing call
and proxy call somewere else and clean LB usage (dialog profiles) for this call.
(or re-start LB process from the beginning)