Python 3 fix
Python 3 fix


Former-commit-id: c46fff784e832fa0c656971ec16b430106fe1432 [formerly bdc2bc51f3fe3f1dc3f1595930988326db912331]
Former-commit-id: 696bcb0e5ab8b14a79625b94f7e016fa1d853815
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine