Update .travis.yml
Update .travis.yml

Former-commit-id: 0557af4179480c99db580277a97c054af39a31a9
AngLi-Leon/peloton,eric-haibin-lin/peloton-1,jessesleeping/iso_peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,vittvolt/peloton,apavlo/peloton,cmu-db/peloton,AllisonWang/peloton,AngLi-Leon/peloton,vittvolt/15721-peloton,AllisonWang/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,wangziqi2016/peloton,wangziqi2016/peloton,AllisonWang/peloton,haojin2/peloton,wangziqi2016/peloton,yingjunwu/peloton,apavlo/peloton,jessesleeping/iso_peloton,yingjunwu/peloton,ShuxinLin/peloton,vittvolt/15721-peloton,phisiart/peloton-p3,wangziqi2016/peloton,AngLi-Leon/peloton,phisiart/peloton-p3,vittvolt/peloton,PauloAmora/peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,cmu-db/peloton,jessesleeping/iso_peloton,haojin2/peloton,vittvolt/peloton,jessesleeping/iso_peloton,malin1993ml/peloton,PauloAmora/peloton,malin1993ml/peloton,yingjunwu/peloton,AngLi-Leon/peloton,cmu-db/peloton,vittvolt/15721-peloton,cmu-db/peloton,jessesleeping/iso_peloton,haojin2/peloton,cmu-db/peloton,vittvolt/peloton,malin1993ml/peloton,vittvolt/15721-peloton,vittvolt/15721-peloton,seojungmin/peloton,apavlo/peloton,AngLi-Leon/peloton,seojungmin/peloton,AllisonWang/peloton,haojin2/peloton,seojungmin/peloton,prashasthip/peloton,prashasthip/peloton,PauloAmora/peloton,ShuxinLin/peloton,malin1993ml/peloton,vittvolt/peloton,PauloAmora/peloton,eric-haibin-lin/peloton-1,malin1993ml/peloton,PauloAmora/peloton,AngLi-Leon/peloton,yingjunwu/peloton,haojin2/peloton,prashasthip/peloton,wangziqi2016/peloton,wangziqi2016/peloton,yingjunwu/peloton,malin1993ml/peloton,seojungmin/peloton,seojungmin/peloton,AllisonWang/peloton,eric-haibin-lin/peloton-1,apavlo/peloton,PauloAmora/peloton,AllisonWang/peloton,jessesleeping/iso_peloton,ShuxinLin/peloton,apavlo/peloton,prashasthip/peloton,apavlo/peloton,ShuxinLin/peloton,ShuxinLin/peloton,eric-haibin-lin/peloton-1,yingjunwu/peloton,seojungmin/peloton,haojin2/peloton,phisiart/peloton-p3,phisiart/peloton-p3,prashasthip/peloton,cmu-db/peloton,prashasthip/peloton,vittvolt/peloton