db/models:
db/models:

Added `__iter__()` to UHS class to make serialization easier.


Former-commit-id: 6ee61ebc4c1a1525fc9fe02cb911adb8ed7b8665 [formerly 90b4b73f78fca3826e6ad4dd2e21e55f790fc910]
Former-commit-id: 721f4ff6dc3f920a078558c799ff16aca82e50c4
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine