Merge pull request 'OZG-6949-refactoring' (#101) from OZG-6949-refactoring into master

...gcloud/antragsraum/security/AuthenticationController.java

...e/ozgcloud/antragsraum/security/AuthenticationHelper.java

.../de/ozgcloud/antragsraum/security/BayernIdProperties.java

...ozgcloud/antragsraum/security/BayernIdSaml2Extension.java

...in/java/de/ozgcloud/antragsraum/security/DefaultRole.java

...cloud/antragsraum/security/InMemoryUserDetailService.java

...java/de/ozgcloud/antragsraum/security/JwtTokenFilter.java

...va/de/ozgcloud/antragsraum/security/JwtTokenProvider.java

...va/de/ozgcloud/antragsraum/security/JwtTokenVerifier.java

...raum/security/SHA256withRSAAndMGF1SignatureAlgorithm.java

...e/ozgcloud/antragsraum/security/SamlRedirectStrategy.java

...agsraum/security/SamlUrlAuthenticationSuccessHandler.java

...va/de/ozgcloud/antragsraum/security/SecurityProvider.java

.../src/main/java/de/ozgcloud/antragsraum/security/User.java

...ain/java/de/ozgcloud/antragsraum/security/UserMapper.java

...de/ozgcloud/antragsraum/AntragsRaumApplicationITCase.java

...a/de/ozgcloud/antragsraum/AntragsRaumApplicationTest.java

.../antragsraum/AntragsRaumApplicationTestConfiguration.java

...rc/test/java/de/ozgcloud/antragsraum/ModularityTests.java

...test/java/de/ozgcloud/antragsraum/RootControllerTest.java