Better hazard curve serialization test.
Better hazard curve serialization test.


Former-commit-id: ad703e9460164e4173bb99941768c9a1b2ce09ac [formerly ad703e9460164e4173bb99941768c9a1b2ce09ac [formerly dd39f25251dab6a1c8caa11b31d0b3c07140846e]]
Former-commit-id: d8c3b8a6056329dbf71a82bef37359691cc9e56f
Former-commit-id: 03d876efe366323d652c6466b5cc05502a2d602c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine