调整ftp连接的模式，统一使用被动模式

src/main/java/com/hikcreate/ftp/proxy/utils/FtpUtil.java

@@ -47,6 +47,7 @@ public class FtpUtil {
             ftpClient.setDefaultPort(port);
             ftpClient.setDataTimeout(DEFAULT_TIMEOUT);
             ftpClient.setControlEncoding(FTP_ENCODE);
+            ftpClient.enterLocalPassiveMode();
             boolean isConnect = ftpClient.login(userName,passWord);
             if(!isConnect) {
                 logger.error("Connection the FtpServer Is Failed!");