Small Fix

Author: preetkaran20

src/main/java/org/sasanlabs/fileupload/attacks/AttackVector.java

@@ -81,6 +81,7 @@ private HttpMessage getUploadedFileHttpMessage(
             uploadedFileRetrievalMsg
                     .getRequestHeader()
                     .setCookies(httpMsg.getRequestHeader().getHttpCookies());
+            uploadedFileRetrievalMsg.setRequestBody("");
             sendAndRecieveHttpMsg.accept(uploadedFileRetrievalMsg);
         } catch (IOException e) {
             throw new FileUploadException(