Fixed gmf_ebrisk test_case_4 [skip hazardlib]
Fixed gmf_ebrisk test_case_4 [skip hazardlib]


Former-commit-id: c30ab7bd988c00e1fd26a4fcf37a1e0828da1ca2
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine