etcdserver: expose 'transferLeadership' as 'MoveLeader'
etcdserver: expose 'transferLeadership' as 'MoveLeader'

Signed-off-by: Gyu-Ho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

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