Pep8/Pylint fixes
Pep8/Pylint fixes


Former-commit-id: 293d7c07a66c33d1781d92d33c11ddb61a53f7c1 [formerly abd2da8c74e18b6a2399899798b627f911fa1efc]
Former-commit-id: eb6dc8840f33b37915886b3fbf0b61b65c353345
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine