tests/calcs/hazard/disagg/core_test:
tests/calcs/hazard/disagg/core_test:

Added lengthy test to exercise the task signalling and callback workflow
(task queuing, progress counter updates, etc.).


Former-commit-id: b825813139c92d8700ab0724bcea8b4a9312158e [formerly 59fc2a1daed9a73f9fd3e41efc0e9acf900a87e6]
Former-commit-id: 7e9d6176a3a166a61c730985e021868c8bdc5313
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine