test/retry: stop leaving endpoint disposition up to random
test/retry: stop leaving endpoint disposition up to random

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