Merge branch 'cleanup' into 'development'

src/main/java/nl/tudelft/ewi/queue/DatabaseLoader.java

src/main/java/nl/tudelft/ewi/queue/QueueApplication.java

...main/java/nl/tudelft/ewi/queue/SamlWebSecurityConfig.java

...java/nl/tudelft/ewi/queue/controller/AdminController.java

...ava/nl/tudelft/ewi/queue/controller/CourseController.java

...l/tudelft/ewi/queue/controller/ErrorControllerAdvice.java

...va/nl/tudelft/ewi/queue/controller/HistoryController.java

.../java/nl/tudelft/ewi/queue/controller/HomeController.java

...n/java/nl/tudelft/ewi/queue/controller/LabController.java

...va/nl/tudelft/ewi/queue/controller/RequestController.java

src/main/java/nl/tudelft/ewi/queue/cqsr/RecordsEvents.java

...i/queue/dialect/AuthenticatedExpressionObjectFactory.java

...ava/nl/tudelft/ewi/queue/factory/NotificationFactory.java

...nl/tudelft/ewi/queue/forms/AssignmentListWrapperForm.java

src/main/java/nl/tudelft/ewi/queue/model/Assignment.java

src/main/java/nl/tudelft/ewi/queue/model/Course.java

...ain/java/nl/tudelft/ewi/queue/model/FirstYearStudent.java

src/main/java/nl/tudelft/ewi/queue/model/Group.java

src/main/java/nl/tudelft/ewi/queue/model/Lab.java

src/main/java/nl/tudelft/ewi/queue/model/Notification.java