bugfix: substituting --password for --pass to pacify mysql 5.5.34+ that no longer recognizes options by their prefix

drop fetch_all_by_from_analysis_id_and_branch_code() method and rely on AUTOLOADed BaseAdaptor's methods instead

If greedy disoriented Workers overshoot analysis_capacity|hive_capacity, make sure they respecialize after the first batch

Individual Worker's specialization is now routed through Scheduler's main subroutine, to enforce more checks