pep8 fixes
pep8 fixes


Former-commit-id: 2eb583228b69f27b5257b7813f120beeaaf2022d [formerly 79db79d21a18abe7383a2879174df2f57aa50c21]
Former-commit-id: e176678b7eb0e161f41dba0cfe5d4560aef48287
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine