raftexample: use Rlock instead of Lock in getsnapshot
raftexample: use Rlock instead of Lock in getsnapshot

etcd-io/etcd,mkumatag/etcd,dannysauer/etcd,joshix/etcd,coreos/etcd,ajityagaty/etcd,xiang90/etcd,gyuho/etcd,ajityagaty/etcd,mkumatag/etcd,dannysauer/etcd,mqliang/etcd,etcd-io/etcd,xiang90/etcd,cockroachdb/etcd,gyuho/etcd,ajityagaty/etcd,mqliang/etcd,rnaveiras/etcd,rnaveiras/etcd,rnaveiras/etcd,cockroachdb/etcd,mkumatag/etcd,coreos/etcd,li-ang/etcd,li-ang/etcd,mqliang/etcd,joshix/etcd,etcd-io/etcd