* optimize test_storage
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* optimize test_metrics
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* optimize test_server
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* optmize test_server
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* optimize test_schedule
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* move test_rpc and test_web to db
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* fix unittest
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* update changelog
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>