support systems with more than one postgres version
support systems with more than one postgres version


Former-commit-id: 091c35e20285e41a883dec419c948c10b98fadee [formerly 7f63488ebfc534e43279490940436e45878c154d]
Former-commit-id: ce59e838ee17bed8c956c9802cd24121c2bf3717
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine