Added EventBasedHazardCase18TestCase
Added EventBasedHazardCase18TestCase


Former-commit-id: f51a0eb70e9a28aca3fd2f026b1564ef003b8937 [formerly 0816aa3115139d09ddcd8c2d9553bdbcf0576977]
Former-commit-id: 10965671276375a9f8bcdc65ed4cfa05ba963639
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine