apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/repository/AppNamespaceRepository.java/AppNamespaceRepository/delete
class AppNamespaceRepository:  @Modifying
  @Query("UPDATE AppNamespace SET IsDeleted=1,DataChange_LastModifiedBy = ?3 WHERE AppId=?1 and Name = ?2")
  int delete(String appId, String namespaceName, String operator);