Fixed WorkerPool.executing
Fixed WorkerPool.executing


Former-commit-id: 0c883d97258e5abb57f3b5d1a3233e9e065490c3 [formerly 0c883d97258e5abb57f3b5d1a3233e9e065490c3 [formerly d3686a55c37e4688b406a4ddbd275909c19343e0]]
Former-commit-id: b257fb6d761d44e5410c5dbec0a972355990c808
Former-commit-id: 178b440be2b9add5002bdb30632fecd4c82e263c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine