* Added new test for using EntityExtractor in query node and made some fixtures to reduce code duplication.
* Reuse ner_node fixture
* Added pytest unit markings and swapped over to in memory doc store.
* Change to integration tests
* Remove dependence on HuggingFace TokenClassificationPipeline and group all postprocessing functions under one class
* Added copyright notice for HF and deepset to entity file to acknowledge that a lot of the postprocessing parts came from the transformers library.
* Fixed text squishing problem. Added additional unit test for it.
Co-authored-by: ju-gu <julian.gutsch@deepset.ai>
