@Override
    protected void configRpcClient(final RpcClient rpcClient) {
        rpcClient.registerConnectEventListener(this.rgGroup);
    }
Raft rpc service based bolt.

@author boyan (boyan@alibaba-inc.com)
@author jiachun.fjc
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/impl/core/DefaultRaftClientService.java