Add contributors [skip CI]
Add contributors [skip CI]

- @CatalinaYepes: https://github.com/gem/oq-engine/commit/9b2f50
- @jasongrig: https://github.com/gem/oq-engine/pull/5780
- @thpap: https://github.com/gem/oq-engine/pull/6056
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine