* update code
Signed-off-by: NYhz <yinghao.zou@zilliz.com>

* optimize http module code
Signed-off-by: NYhz <yinghao.zou@zilliz.com>

* move gpu res handler to config holder
Signed-off-by: NYhz <yinghao.zou@zilliz.com>

* Add setter API for config preload_table (fix #1525)
Signed-off-by: NYhz <yinghao.zou@zilliz.com>

* add else branch at end of if condition
Signed-off-by: NYhz <yinghao.zou@zilliz.com>