Controller methods previously returning primitive types now return

Strings. This fixes incorrect content types being set in the response
header.

src/main/java/de/thm/arsnova/controller/FoodVoteController.java

@@ -60,10 +60,10 @@ public class FoodVoteController extends AbstractController {
 		return foodService.getFoodVote();
 	}
 
-	@RequestMapping(value = "/canteen/menu/vote/count", method = RequestMethod.GET)
+	@RequestMapping(value = "/canteen/menu/vote/count", method = RequestMethod.GET, produces = "text/plain")
 	@ResponseBody
-	public final int getFoodVoteCount() {
-		return foodService.getFoodVoteCount();
+	public final String getFoodVoteCount() {
+		return Integer.toString(foodService.getFoodVoteCount());
 	}
 	
 	

src/main/java/de/thm/arsnova/controller/StatisticsController.java

@@ -21,16 +21,16 @@ public class StatisticsController {
 		return statisticsService.getStatistics();
 	}
 
-	@RequestMapping(method = RequestMethod.GET, value = "/statistics/activeusercount")
+	@RequestMapping(method = RequestMethod.GET, value = "/statistics/activeusercount", produces = "text/plain")
 	@ResponseBody
-	public final int countActiveUsers() {
-		return statisticsService.countActiveUsers();
+	public final String countActiveUsers() {
+		return Integer.toString(statisticsService.countActiveUsers());
 	}
 
-	@RequestMapping(method = RequestMethod.GET, value = "/statistics/sessioncount")
+	@RequestMapping(method = RequestMethod.GET, value = "/statistics/sessioncount", produces = "text/plain")
 	@ResponseBody
-	public final int countSessions() {
-		return statisticsService.getStatistics().getOpenSessions()
-				+ statisticsService.getStatistics().getClosedSessions();
+	public final String countSessions() {
+		return Integer.toString(statisticsService.getStatistics().getOpenSessions()
+				+ statisticsService.getStatistics().getClosedSessions());
 	}
 }