e2e: close process if spawnWithExpects fails
e2e: close process if spawnWithExpects fails

Was causing a process leak in TestCtlV3Alarm

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