Fix maltyped date properties in cortex responder and analyzer types

The `cortex.OutputAnalyzerJob` and `cortex.OutputResponderAction` types have malformed date properties which are incorrectly typed as `str` instead of the correct `int`.

Todos:
- [x] fix the `_createdAt`, `_updatedAt`, `startDate` and `endDate` properties of `OutputAnalyzerJob` 
- [x] fix the `_createdAt`, `_updatedAt`, `startDate` and `endDate` properties of `OutputResponderAction` 