fixing exception throwing bug

where the requestUrl was missing in the response and an exception was thrown internally

src/main/java/org/heigit/bigspatialdata/ohsome/ohsomeapi/exception/CustomizedExceptionHandler.java

@@ -15,8 +15,6 @@
 @ControllerAdvice
 @RestController
 public class CustomizedExceptionHandler extends ResponseEntityExceptionHandler {
-
-  private String requestUrl = RequestInterceptor.requestUrl;
 
   @ExceptionHandler(BadRequestException.class)
   public final ResponseEntity<ErrorDetails> handleBadRequestException(BadRequestException ex) {
@@ -61,6 +59,7 @@ public final ResponseEntity<ErrorDetails> handleTimeoutException() {
   /** Creates the error details based on the thrown exception. */
   private ResponseEntity<ErrorDetails> createExceptionResponse(Exception ex, HttpStatus status) {
     ErrorDetails errorDetails;
+    String requestUrl = RequestInterceptor.requestUrl;
     if ("No message available".equals(ex.getMessage())) {
       if ("null".equals(requestUrl.split("\\?")[1])) {
         requestUrl = requestUrl.split("\\?")[0];