multi_bench: fix request parameters
multi_bench: fix request parameters

Zirpon/tchannel,chenwenbin928/tchannel,bunnyblue/tchannel,savaki/tchannel,RyanTech/tchannel,RyanTech/tchannel,hustxiaoc/tchannel,sasa233/tchannel,chenwenbin928/tchannel,Zirpon/tchannel,i/tchannel,chenwenbin928/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,benfleis/tchannel,sasa233/tchannel,vanloswang/tchannel,Zirpon/tchannel,savaki/tchannel,vanloswang/tchannel,benfleis/tchannel,savaki/tchannel,i/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,i/tchannel,RyanTech/tchannel,sasa233/tchannel,benfleis/tchannel