Small refactoring of CompositeRiskModel.gen_outputs
Small refactoring of CompositeRiskModel.gen_outputs


Former-commit-id: f4a47871c067520cc349cff963f918012602731a [formerly 5848111abe63e1ea72081095b26a2c075115820c]
Former-commit-id: b8d3574855996cbb90b4883c6fb65e87663211f1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine