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

...gcloud/antragsraum/security/AuthenticationHelperTest.java

...loud/antragsraum/security/BayernIdSaml2ExtensionTest.java

...d/antragsraum/security/InMemoryUserDetailServiceTest.java

.../de/ozgcloud/antragsraum/security/JwtTokenFilterTest.java

...e/ozgcloud/antragsraum/security/JwtTokenProviderTest.java

...e/ozgcloud/antragsraum/security/JwtTokenVerifierTest.java

.../security/SHA256withRSAAndMGF1SignatureAlgorithmTest.java

...gcloud/antragsraum/security/SamlRedirectStrategyTest.java

...aum/security/SamlUrlAuthenticationSuccessHandlerTest.java

...e/ozgcloud/antragsraum/security/SecurityProviderTest.java

...java/de/ozgcloud/antragsraum/security/UserMapperTest.java

.../test/java/de/ozgcloud/antragsraum/security/UserTest.java

...ava/de/ozgcloud/antragsraum/security/UserTestFactory.java