stick to UTC when refreshing all time stamps
stick to UTC when refreshing all time stamps


Former-commit-id: 448cba27fda577a6d8c7724b74b8720bfdfc14ac [formerly 2e58e8018bd4b87d0ac266b9b3d9768fed8c710e]
Former-commit-id: c3b758cf3378f7f1bbad59f72f65f846570e37e0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine