Continue work on the ReKognition Extractor

- Change Rekognition to ReKognition
- Add getters for forceFiles, forceUrls and forceContent in AbstractExtractor to allow extending classes to adjust behavior
- Go straight to face extraction in RekognitionExtractor in case we have forceUrls. (Also hide the url field in the extractor etc)
- Fix faceCelebrityTreshold double parsing
Refactoring the rekognition extractor

- Removed rekognition extractor. Abstract Extractor now provides the default UI and the old one is used for configuration.
- AbstractRekognitionExtractor keeps track of a static configuration.
- The configuration UI now simply generates a configuration (jobs, api credentials).
- RekognitionFaceDetector now constructs the whole API request from the imageURL passed to it.
Extend shortened keys to more readable ones in Rekognition Extractor
Merge branch 'rekognition_extractor'
merge
merge