Removed some stuff to make the exercises more challenging.
Merge branch 'master' of https://github.com/kvanrobbroeck/acaddemict-managed into Robin

Conflicts:
	ticket-jar/src/main/java/be/ticket/dao/PassengerDao.java
	ticket-jar/src/main/java/be/ticket/dao/PassengerDaoRemote.java
	ticket-jar/src/main/java/be/ticket/dao/TicketDao.java
	ticket-jar/src/main/java/be/ticket/session/TicketBookingService.java
	ticket-jar/src/main/java/be/ticket/session/TicketNotifier.java
	ticket-jar/src/test/java/be/ticket/PassengerTest.java
	ticket-jar/src/test/java/be/ticket/session/TicketRegistrationTest.java