pkg/testutil: drop go1.4 goroutine leak exception
pkg/testutil: drop go1.4 goroutine leak exception

a-robinson/etcd,heyitsanthony/etcd,coreos/etcd,yudai/etcd,CrazyJvm/etcd,zaphod-concur/etcd,tguangch/etcd,etcd-io/etcd,cockroachdb/etcd,handsomesun/etcd,bdarnell/etcd,jlamillan/etcd,linuxcer/etcd,mickep76/etcd,lorneli/etcd,OyTao/etcd_learning,a-robinson/etcd,chipironcin/etcd,wantonsolutions/dinv-etcd,dnaeon/etcd,endocode/etcd,OyTao/etcd_learning,rchicoli/etcd,tamird/etcd,ravigadde/etcd,rnaveiras/etcd,whuwxl/etcd,joshix/etcd,sebrandon1/etcd,mqliang/etcd,westhood/etcd,zaphod-concur/etcd,plasticbox/etcd,whuwxl/etcd,akauppi/etcd,mickep76/etcd,mkumatag/etcd,akauppi/etcd,joshix/etcd,ajityagaty/etcd,li-ang/etcd,siddontang/etcd,sofuture/etcd,armstrongli/etcd,armstrongli/etcd,mkumatag/etcd,jonboulle/etcd,CrazyJvm/etcd,linuxcer/etcd,etcd-io/etcd,siddontang/etcd,StorReduce/etcd,cockroachdb/etcd,westhood/etcd,luxas/etcd,wantonsolutions/dinv-etcd,luxas/etcd,visheshnp/etcd,jonboulle/etcd,heyitsanthony/etcd,vimalk78/etcd,purpleidea/etcd,glycerine/etcd,xiang90/etcd,bluebreezecf/etcd,yudai/etcd,sinsharat/etcd,fanminshi/etcd,ktateish/etcd,insequent/etcd,achanda/etcd,ajityagaty/etcd,qqsun8819/etcd,swingbach/etcd,sinsharat/etcd,coreos/etcd,dannysauer/etcd,achanda/etcd,rchicoli/etcd,rnaveiras/etcd,qqsun8819/etcd,lumjjb/etcd,lumjjb/etcd,jlamillan/etcd,endocode/etcd,tguangch/etcd,mqliang/etcd,mkumatag/etcd,dnaeon/etcd,nekto0n/etcd,sebrandon1/etcd,mqliang/etcd,plasticbox/etcd,ktateish/etcd,fanminshi/etcd,gyuho/etcd,nekto0n/etcd,li-ang/etcd,lorneli/etcd,hongchaodeng/etcd,YuleiXiao/etcd,gyuho/etcd,bdarnell/etcd,sofuture/etcd,rnaveiras/etcd,handsomesun/etcd,vimalk78/etcd,tamird/etcd,visheshnp/etcd,glevand/coreos--etcd,YuleiXiao/etcd,xiang90/etcd,swingbach/etcd,glevand/coreos--etcd,ajityagaty/etcd,StorReduce/etcd,hongchaodeng/etcd,purpleidea/etcd,chipironcin/etcd,wantonsolutions/dinv-etcd,insequent/etcd,dannysauer/etcd,glycerine/etcd,etcd-io/etcd,ravigadde/etcd,bluebreezecf/etcd