Add zuul logging config.

Change-Id: Ie63267dd28ac84ffd8ba60518e296faba0451d46

modules/openstack-ci-config/files/zuul/logging.conf

@@ -1 +1,39 @@
-#empty for now
+[loggers]
+keys=root,zuul
+
+[handlers]
+keys=console,debug,normal
+
+[formatters]
+keys=simple
+
+[logger_root]
+level=WARNING
+handlers=console
+
+[logger_zuul]
+level=DEBUG
+handlers=debug,normal
+qualname=zuul
+
+[handler_console]
+level=WARNING
+class=StreamHandler
+formatter=simple
+args=(sys.stdout,)
+
+[handler_debug]
+level=DEBUG
+class=logging.handlers.TimedRotatingFileHandler
+formatter=simple
+args=('/var/log/zuul/debug.log', 'midnight', 1, 30,)
+
+[handler_normal]
+level=INFO
+class=logging.handlers.TimedRotatingFileHandler
+formatter=simple
+args=('/var/log/zuul/zuul.log', 'midnight', 1, 30,)
+
+[formatter_simple]
+format=%(asctime)s %(levelname)s %(name)s: %(message)s
+datefmt=