Parse course name for room occupancies

src/main/kotlin/org/mosad/thecitadelofricks/APIController.kt

@@ -102,7 +102,7 @@ class APIController {
         @RequestParam(value = "course", defaultValue = "AI4") courseName: String,
         @RequestParam(value = "subject", defaultValue = "Mathematik 4") lessonSubject: String,
         @RequestParam(value = "week", defaultValue = "0") week: Int
-    ): ArrayList<Lesson> {
+    ): ArrayList<LessonWithRoom> {
         logger.info("lesson request at ${LocalDateTime.now()}!")
         updateTimetableRequests(courseName)
         return getLesson(courseName, lessonSubject, week)