supporting extra-args in tz tests
supporting extra-args in tz tests

groenewold-pythian/gh-ost,wfxiang08/gh-ost,groenewold-pythian/gh-ost,shuhaowu/gh-ost,wfxiang08/gh-ost,druud62/gh-ost,shuhaowu/gh-ost,druud62/gh-ost