1.5.0版本hugegraph.properties配置集群报错

### Bug Type (问题类型)

None

### Before submit

- [x] 我已经确认现有的 [Issues](https://github.com/apache/hugegraph/issues) 与 [FAQ](https://hugegraph.apache.org/docs/guides/faq/) 中没有相同 / 重复问题 (I have confirmed and searched that there are no similar problems in the historical issue and documents)

### Environment (环境信息)

- Server Version: 1.5.0 (Apache Release Version)
- Backend: RocksDB
- OS:32 CPUs, 64G RAM, KylinV10
- Data Size: xx vertices, xx edges

### Expected & Actual behavior (期望与实际表现)

hugegraph.properties配置如下
`
gremlin.graph=org.apache.hugegraph.HugeFactory
vertex.cache_type=l2
edge.cache_type=l2
backend=rocksdb
serializer=binary
store=hugegraph
task.scheduler_type=local
task.schedule_period=10
task.retry=0
task.wait_timeout=10
search.text_analyzer=jieba
search.text_analyzer_mode=INDEX
rocksdb.data_path=./data
rocksdb.wal_path=./wal
raft.mode=true
raft.group_peers=192.168.230.128:8091,192.168.230.129:8092,192.168.230.130:8093
`

rest-server.properties配置如下
`
server.id=server-2
server.role=worker
rpc.server_host=192.168.230.129
rpc.server_port=8092
rpc.server_timeout=30
rpc.remote_url=192.168.230.128:8091,192.168.230.129:8092,192.168.230.130:8093
`
如果 raft.mode=true 不写的话则不会开启集群功能
`
[root@localhost bin]# curl -X GET "http://192.168.230.128:8080/graphs/hugegraph/raft/list_peers" |jq
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 139 100 139 0 0 2194 0 --:--:-- --:--:-- --:--:-- 2241
{
"exception": "class org.apache.hugegraph.HugeException",
"message": "Allowed list_peers operation only when working on raft mode",
"cause": ""
}
`
如果 raft.mode=true 但是如果开启，
`
[root@localhost bin]# ./start-hugegraph.sh
Starting HugeGraphServer in daemon mode...
Connecting to HugeGraphServer (http://0.0.0.0:8080/graphs)...............
The operation timed out(30s) when attempting to connect to http://0.0.0.0:8080/graphs
See /home/apache-hugegraph-incubating-1.5.0/apache-hugegraph-server-incubating-1.5.0/logs/hugegraph-server.log for HugeGraphServer log output.

`
会报错，但是等一会通过验证集群是正常的
`
[root@localhost logs]# curl -X GET "http://192.168.230.128:8080/graphs/hugegraph/raft/list_peers" |jq
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 84 100 84 0 0 380 0 --:--:-- --:--:-- --:--:-- 392
{
"hugegraph": [
"192.168.230.128:8091",
"192.168.230.129:8092",
"192.168.230.130:8093"
]
}

`
`
[root@localhost bin]# curl -X GET "http://192.168.230.128:8080/graphs/hugegraph/raft/get_leader" |jq
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 36 100 36 0 0 1947 0 --:--:-- --:--:-- --:--:-- 2000
{
"hugegraph": "192.168.230.128:8091"
}
`


### Vertex/Edge example (问题点 / 边数据举例)

```javascript
所以如果要开启集群那么 raft.mode=true 这个参数是必须要写的，但是在之前lssues反馈中却说raft.mode=true已经废弃，只需要写raft.group_peers=192.168.230.128:8091,192.168.230.129:8092,192.168.230.130:8093 这个参数就自动开启集群模式，这个显然是错误的。

上诉启动报错是否是因为超时的原因
```

### Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

```javascript

```