Refactored tests of CQRS-handlers for group/direction/intern/teacher/defaultuser models
requested to merge features/55-refactoring-of-cqrs-tests-2-rewrite-tests-according-to-the-principle-one-test-method-tests-one-method-functionality into develop
Refactored tests of CQRS-handlers for group/direction/intern/teacher/defaultuser models