style: 补充代码注释

src/modules/network_element/controller/ne_host.go

@@ -203,6 +203,7 @@ func (s *NeHostController) Test(c *gin.Context) {
 			return
 		}
 		defer client.Close()
+		// 是否有终止符
 		if strings.HasSuffix(client.LastResult, ">") || strings.HasSuffix(client.LastResult, "> ") || strings.HasSuffix(client.LastResult, "# ") {
 			c.JSON(200, result.Ok(nil))
 		} else {

src/modules/network_element/service/ne_license.impl.go

@@ -174,7 +174,7 @@ func (r *NeLicenseImpl) UploadLicense(neLicense model.NeLicense) error {
 
 	// 上传授权文件去覆盖
 	if err := sftpClient.CopyFileLocalToRemote(omcLicensePath, neLicensePath); err != nil {
-		return err
+		return fmt.Errorf("please check if scp remote copy is allowed")
 	}
 
 	// 重启服务