Added more resources.

- CandidateRessource - /candidates/{candidate_id}
- AdmissionResultsResource - /admission_results ("secured" and checked
with Postman)
- AdmissionResultsPerCandidate - /admission_results/{candidate_id}

Changed the url to the server (I removed that environment by mistake).
The correct url is in the documentation:
http://fii-admis-restservice-dt5dd3kc2v.elasticbeanstalk.com/