added enum to map different profile types.
changed affacted entities.
finished new profile system
--> handler and tests won't work anymore --> Bennis issue
removed handler and test classes to get the project build
added parent entity
changed profile mapping of student and teaching material
--> now they have a list of ProfileTypes

added lazy loading to entitie relationships
changed profile list to profile set
Merge remote-tracking branch 'ChangedEntity/changeEntityClasses' into changeEntityClasses
- commit to checkout
Merge branch 'changeEntityClasses' into changeEntities

Conflicts:
	src/main/java/de/dhbw/humbuch/dataImport/MyCSVHandler.java
	src/main/java/de/dhbw/humbuch/model/ProfileHandler.java
	src/main/java/de/dhbw/humbuch/model/StudentHandler.java
	src/main/java/de/dhbw/humbuch/model/TeachingMaterialHandler.java
	src/main/java/de/dhbw/humbuch/model/entity/Profile.java
	src/main/java/de/dhbw/humbuch/model/entity/Student.java
	src/main/java/de/dhbw/humbuch/model/entity/TeachingMaterial.java
	src/main/java/de/dhbw/humbuch/pdfExport/MyPDFClassList.java
	src/main/java/de/dhbw/humbuch/pdfExport/MyPDFStudentList.java
	src/main/resources/META-INF/persistence.xml
	src/test/java/de/dhbw/humbuch/tests/CSVTest.java
	src/test/java/de/dhbw/humbuch/tests/GradeTest.java
	src/test/java/de/dhbw/humbuch/tests/PDFTest.java
	src/test/java/de/dhbw/humbuch/tests/StudentTest.java
- implemented ProfileTypeHandler
- fixed tests for new profile implementation in entities
- fixed pdf creation for new profile implementation in entities