* Added code for the migration from JUnit 4 to JUnit 5
* Add example for Rule migration support
* Add fix to access modifiers to test methods
* Remove wrong header
* Add junit5-migration module and its code snippets
* Add module configuration to pom
* Remove test classes that were added for the migration from JUnit 4 to JUnit 5 article (moved under correct module)
* move security content from spring-security-rest-full
* swagger update
* move query language to new module
* rename spring-security-rest-full to spring-rest-full
* group persistence modules
* group testing modules
* try fix conflict