pylint fixes
pylint fixes


Former-commit-id: 1379853e4a946149579ea3f1a9b7ce655f93216e [formerly baa4d3de4cfd5594c745d5fbb55c93a3f083cda2]
Former-commit-id: 63bded17c941da66c739d16f1cde9ca065854091
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine