Update Celery requirements in setup.py
Update Celery requirements in setup.py


Former-commit-id: 602d4fd038f9a041ec5b4473fb70700a55bee97c [formerly 2701d90321348e255d0f733c5ae7da73816618f8]
Former-commit-id: 085f293c805ec995e92945d8c7afbf571e0b07d0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine