fix(api): fix remoting rpc server not started

[jadepeng]

使用rocksdb作为后端存储+开启raft，不能成功启动，registerRpcServices时未导出service，rpcserver未启动

增加判断，如果server未启动，手动启动

   /*
         * Skip register cache-rpc service if it's non-shared storage,
         * because we assume cache of non-shared storage is updated by raft.
         */
        if (!this.backendStoreFeatures().supportsSharedStorage()) {
            return;
        }

[codecov]

Codecov Report

Merging #1975 (bb66415) into master (8f4e95d) will increase coverage by 0.08%.
The diff coverage is 0.00%.

❗ Current head bb66415 differs from pull request most recent head c455be1. Consider uploading reports for the commit c455be1 to get more accurate results

@@             Coverage Diff              @@
##             master    #1975      +/-   ##
============================================
+ Coverage     70.46%   70.54%   +0.08%     
+ Complexity      978      724     -254     
============================================
  Files           454      454              
  Lines         39138    39055      -83     
  Branches       5574     5557      -17     
============================================
- Hits          27579    27552      -27     
+ Misses         8848     8804      -44     
+ Partials       2711     2699      -12     

Impacted Files	Coverage Δ
...in/java/com/baidu/hugegraph/core/GraphManager.java	44.56% <0.00%> (-0.33%)	⬇️
...in/java/com/baidu/hugegraph/schema/IndexLabel.java	76.13% <0.00%> (-1.14%)	⬇️
...hugegraph/backend/store/raft/rpc/RaftRequests.java	19.01% <0.00%> (-0.89%)	⬇️
...om/baidu/hugegraph/backend/store/BackendTable.java	84.52% <0.00%> (-0.60%)	⬇️
...va/com/baidu/hugegraph/backend/cache/RamCache.java	72.22% <0.00%> (-0.56%)	⬇️
...va/com/baidu/hugegraph/util/collection/IntSet.java	74.57% <0.00%> (-0.43%)	⬇️
...ugegraph/backend/store/raft/StoreStateMachine.java	65.76% <0.00%> (+0.90%)	⬆️
...hugegraph/backend/store/raft/rpc/RpcForwarder.java	71.18% <0.00%> (+1.69%)	⬆️
.../hugegraph/backend/store/rocksdb/RocksDBTable.java	69.12% <0.00%> (+2.01%)	⬆️
...om/baidu/hugegraph/api/filter/ExceptionFilter.java	60.57% <0.00%> (+3.84%)	⬆️

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[imbajin]

使用rocksdb作为后端存储+开启raft，不能成功启动，registerRpcServices时未导出service，rpcserver未启动

两个问题, 第一个是现在官方 raft 的配置里, 就正常无法启动么? (似乎这是不符合预期的, 配置好像在 issue 里, 文档可能没更新)

第二个描述发生的情况是?

[imbajin]

so we will always start the rpc server?

[javeme]

it goes here only when raft mode enabled

[jadepeng]

使用rocksdb作为后端存储+开启raft，不能成功启动，registerRpcServices时未导出service，rpcserver未启动

两个问题, 第一个是现在官方 raft 的配置里, 就正常无法启动么? (似乎这是不符合预期的, 配置好像在 issue 里, 文档可能没更新)

从issue里找的配置

第二个描述发生的情况是?

GraphManager.startRpcServer

for (Graph graph : this.graphs.values()) {
                HugeGraph hugegraph = (HugeGraph) graph;
                hugegraph.registerRpcServices(serverConfig, clientConfig);
}

这里registerRpcServices时，rockdb not supportsSharedStorage

    @Override
    public void registerRpcServices(RpcServiceConfig4Server serverConfig,
                                    RpcServiceConfig4Client clientConfig) {
        /*
         * Skip register cache-rpc service if it's non-shared storage,
         * because we assume cache of non-shared storage is updated by raft.
         */
        if (!this.backendStoreFeatures().supportsSharedStorage()) {
            return;
        }

所以serverConfig未成功addService，exportAll时skip starting RpcServer

[imbajin]

seems Code scanning results alert a high sec problem, someone could fix it in another PR?