debian/postinst: remove broken celery code and fix postgres
debian/postinst: remove broken celery code and fix postgres


Former-commit-id: 576cbc772d3ab52dbc790492c7f7cde2ae604572 [formerly 71dfde102cf17be583c87c4f872c7dbb869eb0a5]
Former-commit-id: d62c62a9984553e639a277a206f19a4f129ddeb1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine