fix(rest): also handle MissingServletRequestPartException for multipart missing params

Author: Shivamrut

rest/resource-server/src/main/java/org/eclipse/sw360/rest/resourceserver/core/RestExceptionHandler.java

@@ -30,6 +30,7 @@
 import org.springframework.web.HttpRequestMethodNotSupportedException;
 import org.springframework.web.bind.MissingServletRequestParameterException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.multipart.support.MissingServletRequestPartException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.servlet.resource.NoResourceFoundException;
@@ -59,8 +60,8 @@ public ResponseEntity<ErrorMessage> handleMessageNotReadableException(RuntimeExc
         return new ResponseEntity<>(new ErrorMessage(e, HttpStatus.BAD_REQUEST), HttpStatus.BAD_REQUEST);
     }
 
-    @ExceptionHandler(MissingServletRequestParameterException.class)
-    public ResponseEntity<ErrorMessage> handleMissingServletRequestParameter(MissingServletRequestParameterException e) {
+    @ExceptionHandler({MissingServletRequestParameterException.class, MissingServletRequestPartException.class})
+    public ResponseEntity<ErrorMessage> handleMissingServletRequestParameter(Exception e) {
         return new ResponseEntity<>(new ErrorMessage(e, HttpStatus.BAD_REQUEST), HttpStatus.BAD_REQUEST);
     }