[IOTDB-785] Disable anonymous access MQTT service (#1447)

* [IOTDB-503] Add checkTimeseriesExists for session
* [IOTDB-785] Disable anonymous access MQTT service

server/src/main/java/org/apache/iotdb/db/service/MQTTService.java

@@ -77,6 +77,8 @@ public class MQTTService implements IService {
         properties.setProperty(BrokerConstants.PORT_PROPERTY_NAME, String.valueOf(iotDBConfig.getMqttPort()));
         properties.setProperty(BrokerConstants.BROKER_INTERCEPTOR_THREAD_POOL_SIZE, String.valueOf(iotDBConfig.getMqttHandlerPoolSize()));
         properties.setProperty(BrokerConstants.IMMEDIATE_BUFFER_FLUSH_PROPERTY_NAME, "true");
+        properties.setProperty(BrokerConstants.ALLOW_ANONYMOUS_PROPERTY_NAME, "false");
+        properties.setProperty(BrokerConstants.ALLOW_ZERO_BYTE_CLIENT_ID_PROPERTY_NAME, "true");
         properties.setProperty(BrokerConstants.NETTY_MAX_BYTES_PROPERTY_NAME, String.valueOf(iotDBConfig.getMqttMaxMessageSize()));
         return new MemoryConfig(properties);
     }