teacherTask and update tasks

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

.../src/main/java/unipotsdam/gf/modules/group/GroupView.java

...otsdam/gf/modules/journal/service/JournalServiceImpl.java

...f/modules/submission/controller/SubmissionController.java

...hen/src/main/java/unipotsdam/gf/modules/user/UserDAO.java

...in/java/unipotsdam/gf/process/ProjectCreationProcess.java

...en/src/main/java/unipotsdam/gf/process/tasks/TaskDAO.java

gemeinsamforschen/src/main/webapp/project/js/tasks.js

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

...rc/test/java/unipotsdam/gf/interfaces/AnnotationTest.java

...sdam/gf/modules/journal/model/dao/JournalDAOImplTest.java