backend hanwatts prediction model web interface

Merge pull request #15 in UPRFIR/backend-hanwatts-prediction-model-web-interface from bugfix/UPRFIR-84-backend-controller-maken-om-energieproductie-op-te-halen to development

* commit '85f8dde516a94f6eeeaaf62f19f1befe2b2d5ef5':
  Fixen van getEnergyData code. Ook even dummy data vn vandaag toegevoegd
  fixed the tests according to refactor
  typo
  Refactored alleen nog interne bugs over in dao.py