refactor rpc_channel.cpp
refactor rpc_channel.cpp

seojungmin/peloton,cmu-db/peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,AllisonWang/peloton,seojungmin/peloton,prashasthip/peloton,haojin2/peloton,wangziqi2016/peloton,cmu-db/peloton,vittvolt/peloton,vittvolt/15721-peloton,ShuxinLin/peloton,haojin2/peloton,AllisonWang/peloton,vittvolt/peloton,AngLi-Leon/peloton,seojungmin/peloton,apavlo/peloton,prashasthip/peloton,AngLi-Leon/peloton,ShuxinLin/peloton,AngLi-Leon/peloton,vittvolt/peloton,apavlo/peloton,PauloAmora/peloton,phisiart/peloton-p3,yingjunwu/peloton,jessesleeping/iso_peloton,malin1993ml/peloton,malin1993ml/peloton,prashasthip/peloton,vittvolt/peloton,haojin2/peloton,haojin2/peloton,malin1993ml/peloton,PauloAmora/peloton,wangziqi2016/peloton,vittvolt/15721-peloton,phisiart/peloton-p3,AngLi-Leon/peloton,vittvolt/15721-peloton,PauloAmora/peloton,prashasthip/peloton,prashasthip/peloton,yingjunwu/peloton,yingjunwu/peloton,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,haojin2/peloton,PauloAmora/peloton,phisiart/peloton-p3,malin1993ml/peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton,seojungmin/peloton,malin1993ml/peloton,phisiart/peloton-p3,PauloAmora/peloton,ShuxinLin/peloton,AllisonWang/peloton,ShuxinLin/peloton,yingjunwu/peloton,seojungmin/peloton,jessesleeping/iso_peloton,cmu-db/peloton,yingjunwu/peloton,eric-haibin-lin/peloton-1,haojin2/peloton,AllisonWang/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,eric-haibin-lin/peloton-1,cmu-db/peloton,malin1993ml/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,prashasthip/peloton,phisiart/peloton-p3,vittvolt/peloton,jessesleeping/iso_peloton,apavlo/peloton,vittvolt/peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,wangziqi2016/peloton,AllisonWang/peloton,apavlo/peloton,yingjunwu/peloton,AllisonWang/peloton,cmu-db/peloton,ShuxinLin/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,eric-haibin-lin/peloton-1,seojungmin/peloton,cmu-db/peloton,apavlo/peloton,PauloAmora/peloton,AngLi-Leon/peloton,vittvolt/15721-peloton,vittvolt/15721-peloton