skip trial reportts from print run; merge Model::PrintRun _print_run_excluded() and get_print_run_request_ids() to get single query, but RDBO cannot handle complexity so need to replace with SQL::Abstract::More method as used by print_run.pl
tied print_run.pl script to 'print_run_skip_trials' config setting so that both manual and automatic report generation produce the same output with a single config change