Replaced csv_importer with the mipdb
Created by: KFilippopolitis
Changelog:
- Removed the csv_importer
- Added mipdb as a dev-dependency
- Data are now loaded with the mipdb
- Queries for get schemas/datasets where updated according to the mipdb specifications
- Pathologies folders now contain a version (this is a temporary fix untill the https://redmine.hbpmip.link/issues/661 is resolved)