Factor out TChannelPeers.close
Factor out TChannelPeers.close

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