Fix the ensure_on() method in dbserver.py [demos]
Fix the ensure_on() method in dbserver.py [demos]


Former-commit-id: 68ae3f272ae9e3f73875f79d1bc81672e660d06b [formerly 68ae3f272ae9e3f73875f79d1bc81672e660d06b [formerly 0fb700db5dbf28628678bcc40373c687a6a662cc]]
Former-commit-id: 3b58800032977ef55c10bb4e655e372b5bf20cc8
Former-commit-id: 5a013029f83230f9f95b8f18c2578d49689610d6
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine