fix: rename file-count method from commons fileupload2

Author: cortlepp

modules/kernel/src/org/apache/axis2/builder/MultipartFormDataBuilder.java

@@ -125,7 +125,7 @@ private static List parseRequest(JakartaServletRequestContext requestContext)
         JakartaServletFileUpload upload = new JakartaServletFileUpload<>(fileItemFactory);
         // There must be a limit. 
         // This is for contentType="multipart/form-data"
-        upload.setFileCountMax(1L);
+        upload.setMaxFileCount(1L);
         // Parse the request
         return upload.parseRequest(requestContext);
     }

modules/webapp/src/main/java/org/apache/axis2/webapp/AdminActions.java

@@ -154,7 +154,7 @@ public Redirect doUpload(HttpServletRequest req) throws ServletException {
                 // There must be a limit. This is for an aar file upload,
                 // presumably only one. See:
                 // https://axis.apache.org/axis2/java/core/docs/webadminguide.html#upservice
-                upload.setFileCountMax(1L);
+                upload.setMaxFileCount(1L);
                 List<?> items = upload.parseRequest(req);
                 // Process the uploaded items
                 Iterator<?> iter = items.iterator();