increased test_info buffer size
increased test_info buffer size

yeahdongcn/slowhttptest,a12689851/slowhttptest,Chigirin/slowhttptest,mfazliazran/slowhttptest,mfazliazran/slowhttptest,a12689851/slowhttptest,jack-ju/slowhttptest,jengyic/slowhttptest,tectronics/slowhttptest,jengyic/slowhttptest,mentesc/slowhttptest,0x37N0w4N/slowhttptest,Chigirin/slowhttptest,tectronics/slowhttptest,jack-ju/slowhttptest,yeahdongcn/slowhttptest,0x37N0w4N/slowhttptest,mentesc/slowhttptest