tests/job/validation_test:
tests/job/validation_test:

Made `DisaggHazardFormTestCase` test cases more DRY.


Former-commit-id: ed62f6843f150aa7f9b6d7d7dafdfc5ca96e9483
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine