Fixed duplicate assets serialization bug
Fixed duplicate assets serialization bug


Former-commit-id: e79599857eb76b1de08f80a29bb5e75c63ab5b46 [formerly ee411e5f5d45534b19f054bcf680fdf51ee67159]
Former-commit-id: 0bd9c51567a6c7e2844ab9814f758cf544eda321
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine