Exception Handler

• add an exception handler
• fix logout

src/main/java/nl/tudelft/portal/controller/ApplicationController.java

@@ -56,16 +56,6 @@ public class ApplicationController {
 		return "privacy";
 	}
 
-	/**
-	 * Returns the error page.
-	 *
-	 * @return the link to the template which appears for errors
-	 */
-	@GetMapping("error")
-	public String error() {
-		return "error";
-	}
-
 	// NEED AUTHENTICATION ------------------------------------------
 
 	/**