Changed DataStore.get_attrs to look at the parent [skip hazardlib]
Changed DataStore.get_attrs to look at the parent [skip hazardlib]


Former-commit-id: 3356dc55faf25f861fdae1b6ff9013bae295d8a9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine