ctlv3: keep lease as integer in fields printer
ctlv3: keep lease as integer in fields printer

Output was giving %!d(string=) instead of the expected lease ID
value.

plasticbox/etcd,bdarnell/etcd,ajityagaty/etcd,gyuho/etcd,etcd-io/etcd,yudai/etcd,lorneli/etcd,dannysauer/etcd,mqliang/etcd,armstrongli/etcd,whuwxl/etcd,glevand/coreos--etcd,rnaveiras/etcd,YuleiXiao/etcd,dannysauer/etcd,glevand/coreos--etcd,fanminshi/etcd,ajityagaty/etcd,mickep76/etcd,mqliang/etcd,visheshnp/etcd,coreos/etcd,whuwxl/etcd,lorneli/etcd,ajityagaty/etcd,mkumatag/etcd,yudai/etcd,armstrongli/etcd,heyitsanthony/etcd,fanminshi/etcd,mqliang/etcd,mickep76/etcd,coreos/etcd,vimalk78/etcd,cockroachdb/etcd,li-ang/etcd,akauppi/etcd,rnaveiras/etcd,sebrandon1/etcd,cockroachdb/etcd,plasticbox/etcd,a-robinson/etcd,etcd-io/etcd,sebrandon1/etcd,mkumatag/etcd,vimalk78/etcd,xiang90/etcd,sinsharat/etcd,joshix/etcd,mkumatag/etcd,bluebreezecf/etcd,bdarnell/etcd,rnaveiras/etcd,visheshnp/etcd,li-ang/etcd,heyitsanthony/etcd,bluebreezecf/etcd,akauppi/etcd,xiang90/etcd,joshix/etcd,etcd-io/etcd,sinsharat/etcd,gyuho/etcd,YuleiXiao/etcd,a-robinson/etcd