Introducced a monitoring thread checking if the celery workers are up
Introducced a monitoring thread checking if the celery workers are up


Former-commit-id: 03c03301a5bb20460ab829914d721ced986e2262 [formerly 7eae865788d00ca9f944962027cdafc3e516adf8]
Former-commit-id: 636559574e96fc97de3380e449daeaf367f2eaf2
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine