feat: added functional tests for the backend components

gemeinsamforschen/pom.xml

...c/main/java/unipotsdam/gf/config/GFApplicationBinder.java

...c/main/java/unipotsdam/gf/core/management/Management.java

...in/java/unipotsdam/gf/core/management/ManagementImpl.java

...sdam/gf/core/management/project/ProjectConfiguration.java

...chen/src/main/java/unipotsdam/gf/interfaces/Feedback.java

...c/main/java/unipotsdam/gf/interfaces/ICourseCreation.java

...unipotsdam/gf/modules/assessment/AssessmentMechanism.java

...sdam/gf/modules/groupfinding/GroupFormationMechanism.java

...gf/modules/groupfinding/service/GroupCreationService.java

...nipotsdam/gf/modules/peer2peerfeedback/DummyFeedback.java

...modules/researchreport/DummyResearchReportManagement.java

.../unipotsdam/gf/modules/researchreport/ResearchReport.java

...m/gf/modules/researchreport/ResearchReportManagement.java

gemeinsamforschen/src/main/resources/log4j2.xml

.../test/java/unipotsdam/gf/interfaces/ActivityFlowTest.java

...hen/src/test/java/unipotsdam/gf/interfaces/PhaseTest.java