integration: test a canceled watch won't return a closing error
integration: test a canceled watch won't return a closing error

yudai/etcd,qqsun8819/etcd,rnaveiras/etcd,dannysauer/etcd,visheshnp/etcd,zaphod-concur/etcd,fanminshi/etcd,hongchaodeng/etcd,vimalk78/etcd,ajityagaty/etcd,hongchaodeng/etcd,sinsharat/etcd,visheshnp/etcd,luxas/etcd,xiang90/etcd,insequent/etcd,etcd-io/etcd,rnaveiras/etcd,fanminshi/etcd,OyTao/etcd_learning,mkumatag/etcd,joshix/etcd,nekto0n/etcd,mickep76/etcd,rchicoli/etcd,lorneli/etcd,rchicoli/etcd,ravigadde/etcd,dannysauer/etcd,zaphod-concur/etcd,YuleiXiao/etcd,whuwxl/etcd,handsomesun/etcd,handsomesun/etcd,CrazyJvm/etcd,a-robinson/etcd,etcd-io/etcd,sebrandon1/etcd,gyuho/etcd,cockroachdb/etcd,armstrongli/etcd,ajityagaty/etcd,joshix/etcd,luxas/etcd,ravigadde/etcd,lumjjb/etcd,mqliang/etcd,mkumatag/etcd,xiang90/etcd,jlamillan/etcd,mqliang/etcd,jlamillan/etcd,sinsharat/etcd,bdarnell/etcd,heyitsanthony/etcd,a-robinson/etcd,gyuho/etcd,glevand/coreos--etcd,yudai/etcd,cockroachdb/etcd,lorneli/etcd,nekto0n/etcd,coreos/etcd,etcd-io/etcd,qqsun8819/etcd,bluebreezecf/etcd,CrazyJvm/etcd,plasticbox/etcd,YuleiXiao/etcd,bluebreezecf/etcd,plasticbox/etcd,sebrandon1/etcd,glevand/coreos--etcd,armstrongli/etcd,akauppi/etcd,OyTao/etcd_learning,lumjjb/etcd,mqliang/etcd,whuwxl/etcd,tguangch/etcd,akauppi/etcd,endocode/etcd,insequent/etcd,heyitsanthony/etcd,rnaveiras/etcd,vimalk78/etcd,ajityagaty/etcd,mkumatag/etcd,tguangch/etcd,li-ang/etcd,coreos/etcd,mickep76/etcd,endocode/etcd,bdarnell/etcd,li-ang/etcd