db/schema/security.sql:
db/schema/security.sql:

Revised security.sql:
    - `oq_admin` now is the only user with the ability to delete records, with
      the exception of tables in the `htemp` schema
    - general clean-up and revision of GRANT statements to make them more
      concise and readable


Former-commit-id: 613efc6bed586cfe39e44a23a6abf3fc8117e71e [formerly 613efc6bed586cfe39e44a23a6abf3fc8117e71e [formerly 096b9f75380b4580d9e4ddee5c11f6d431902a3d]]
Former-commit-id: 9f12480fcdc7e364d46ec100e575645cc1cecb1d
Former-commit-id: 55e82e736047a69b6607cf4d7910eb5b99ccd8dc
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine