change long polling log level to debug (#174)

Author: lepdou

polaris-configuration/polaris-configuration-client/src/main/java/com/tencent/polaris/configuration/client/internal/DefaultConfigFileLongPollingService.java

@@ -114,7 +114,7 @@ private void doLongPolling() {
             try {
                 List<ConfigFile> watchConfigFiles = assembleWatchConfigFiles();
 
-                LOGGER.info("[Config] do long polling. config file size = {}, delay time = {}", watchConfigFiles.size(),
+                LOGGER.debug("[Config] do long polling. config file size = {}, delay time = {}", watchConfigFiles.size(),
                         retryPolicy.getCurrentDelayTime());
 
                 ConfigFileResponse response = configFileConnector.watchConfigFiles(watchConfigFiles);