Changed the parallelize method to spawn all the tasks at once
Changed the parallelize method to spawn all the tasks at once


Former-commit-id: 4346c4b19fe95821dd0d5a52910bf74d73fe33c5 [formerly 4346c4b19fe95821dd0d5a52910bf74d73fe33c5 [formerly 77b3cbbaf02be00a1fc33a7bd5c321549707d5c5]]
Former-commit-id: 1077a653f6797d80a8182d780c2a2e23a38397ea
Former-commit-id: c0f1bf4dc7f1994b86f5526f9d9c3625b954587e
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine