remove docstrings from tests
remove docstrings from tests


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Former-commit-id: 0e4f69b66679bb2c33454b943dece8763597c660
Former-commit-id: 544b91df2905b0a8ba8b0057c1cbc384673c0c60
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine