originalGroups persists in DB

...src/main/java/unipotsdam/gf/interfaces/IGroupFinding.java

...potsdam/gf/modules/fileManagement/fileManagementView.java

...n/src/main/java/unipotsdam/gf/modules/group/GroupDAO.java

...in/java/unipotsdam/gf/modules/group/GroupfindingImpl.java

...ain/java/unipotsdam/gf/process/GroupFormationProcess.java

...en/src/test/java/unipotsdam/gf/CheckEqualityOfGroups.java

...n/src/test/java/unipotsdam/gf/EqualityOfGroupsHelper.java

gemeinsamforschen/src/test/resources/database/fltrail.sql