make tests more robust
make tests more robust


Former-commit-id: bbb0b9b299eb304fdc84436767f00de1f222e9dc [formerly 0dce59c4f90986e25f48045218683694f0ef1edd]
Former-commit-id: 95dde77dbfb4be285a0d7056506a42a1196c7ed1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine