Fixed a Python 3 issue
Fixed a Python 3 issue


Former-commit-id: 49fe3afe1fa548ad79c370dcacc880383ebc9994 [formerly 5ccd12e3353f9a83befbf8c4dc728247021460b5]
Former-commit-id: 59ccc55920af487689c86d1aa52dcedbd775172b
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine