Fix root logging

root and logger are same level. https://docs.python.org/2/library/logging.config.html#dictionary-schema-details

Author: fangfei

gunicorn/glogging.py

@@ -49,8 +49,8 @@
         version=1,
         disable_existing_loggers=False,
 
+        root={"level": "INFO", "handlers": ["console"]},
         loggers={
-            "root": {"level": "INFO", "handlers": ["console"]},
             "gunicorn.error": {
                 "level": "INFO",
                 "handlers": ["error_console"],