added method get_num_running_workers which just returns a count. used by lsf_beekeeper to decide when it needs to do a hard resync.
added method get_num_running_workers which just returns a count.
used by lsf_beekeeper to decide when it needs to do a hard resync.

Ensembl/ensembl-hive,Ensembl/ensembl-hive,Ensembl/ensembl-hive,Ensembl/ensembl-hive