another pylint fix
another pylint fix


Former-commit-id: 9b9de0dd1159368a9409ac9fd5f5b2ee3fb5146b [formerly d9cf1213b8b970974750b54be1e631bc542b3a30]
Former-commit-id: 984f3c2f732978f73c96c8ccc50695876f02dda9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine