Migrate GET test-result/…

A new version of the endpoint is available.

	Endpoint	Response
Current	GET `/api/2/test-result/{test}/{ticket}`	2.0 TestResult
Target	GET `/api/2.1.1/test-result/{test}/{ticket}`	2.1.1 TestResult

The response has changed in several ways:

subject and style can be found in the 2.1.1 Test object.
The score of the test can be found in score.percentage.
realName (the name of the user) can be found in user.name.
The following properties are not present in the response anymore:
- duration
- correctlyAnswered
- drills
- questions