Updated celeryconfig.py to work with Celery 3.1
Updated celeryconfig.py to work with Celery 3.1


Former-commit-id: 142138443a58abceeea12b819127c18917f44081 [formerly fa41b37fe25877dbbf700b529e0fca9f4a6b6add]
Former-commit-id: 2cc185134a9d48151701d5f9e6013c93ab3d1c2c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine