Update .travis.yml
Update .travis.yml

Former-commit-id: c15ec41ee66a3024bf31fddff8864c11f1fb033d
seojungmin/peloton,AngLi-Leon/peloton,jessesleeping/iso_peloton,yingjunwu/peloton,vittvolt/peloton,seojungmin/peloton,vittvolt/15721-peloton,vittvolt/peloton,malin1993ml/peloton,prashasthip/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,ShuxinLin/peloton,AllisonWang/peloton,vittvolt/15721-peloton,seojungmin/peloton,prashasthip/peloton,vittvolt/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,haojin2/peloton,PauloAmora/peloton,phisiart/peloton-p3,phisiart/peloton-p3,vittvolt/peloton,yingjunwu/peloton,haojin2/peloton,eric-haibin-lin/peloton-1,seojungmin/peloton,AllisonWang/peloton,apavlo/peloton,apavlo/peloton,PauloAmora/peloton,yingjunwu/peloton,prashasthip/peloton,vittvolt/peloton,wangziqi2016/peloton,vittvolt/15721-peloton,cmu-db/peloton,jessesleeping/iso_peloton,haojin2/peloton,AngLi-Leon/peloton,malin1993ml/peloton,PauloAmora/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,AllisonWang/peloton,yingjunwu/peloton,cmu-db/peloton,apavlo/peloton,AllisonWang/peloton,malin1993ml/peloton,wangziqi2016/peloton,phisiart/peloton-p3,PauloAmora/peloton,haojin2/peloton,AllisonWang/peloton,wangziqi2016/peloton,prashasthip/peloton,AngLi-Leon/peloton,AngLi-Leon/peloton,eric-haibin-lin/peloton-1,ShuxinLin/peloton,prashasthip/peloton,phisiart/peloton-p3,seojungmin/peloton,ShuxinLin/peloton,vittvolt/peloton,AllisonWang/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,cmu-db/peloton,cmu-db/peloton,vittvolt/15721-peloton,phisiart/peloton-p3,ShuxinLin/peloton,prashasthip/peloton,eric-haibin-lin/peloton-1,jessesleeping/iso_peloton,phisiart/peloton-p3,AngLi-Leon/peloton,wangziqi2016/peloton,vittvolt/15721-peloton,seojungmin/peloton,malin1993ml/peloton,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,yingjunwu/peloton,jessesleeping/iso_peloton,wangziqi2016/peloton,PauloAmora/peloton,malin1993ml/peloton,apavlo/peloton,haojin2/peloton,yingjunwu/peloton,PauloAmora/peloton,AngLi-Leon/peloton,cmu-db/peloton,cmu-db/peloton,haojin2/peloton,malin1993ml/peloton,jessesleeping/iso_peloton