Switch to celery mode via openquake.cfg in packager OQ_DISTRIBUTE=celery needs to be passed to celery too, but this is complex here since we are using supervisor to start it [skip ci]
Switch to celery mode via openquake.cfg in packager
OQ_DISTRIBUTE=celery needs to be passed to celery too, but this is complex here since we are using supervisor to start it [skip ci]


Former-commit-id: 728215f7571b1f1c7f0a3f764560d84f434082e2
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine