engine: align a comment in openquake_cli.py with the one in server
engine: align a comment in openquake_cli.py with the one in server

Former-commit-id: 797faeff73ccdffbccb360a8057170c28e8b1fcc [formerly d800c1e3ff5fc5c022666ec942f4abdac9eb83e9]
Former-commit-id: e7b4dea11db2e7fe743eed4febdfb8c1616c3572
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine