Use Django ORM in the classical PSHA risk engine.
Use Django ORM in the classical PSHA risk engine.


Former-commit-id: 99d7fe0ee41019262c5f85ed8893869d8599070c [formerly f602ab255681e6243252045865d9f1eb521ffc64]
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gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine