Fix logging when under systemd

Both keystone and neutron didn't yet have systemd awareness for
setting up logging (i.e. drop the extra date / time stamps)

Change-Id: Ib442c603c9afb679676976c37c2c6122201ae846
diff --git a/lib/keystone b/lib/keystone
index 61b0a0c..4bb6893 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -267,9 +267,7 @@
     fi
 
     # Format logging
-    if [ "$LOG_COLOR" == "True" ] && [ "$SYSLOG" == "False" ] && [ "$KEYSTONE_DEPLOY" != "mod_wsgi" ] ; then
-        setup_colorized_logging $KEYSTONE_CONF
-    fi
+    setup_logging $KEYSTONE_CONF
 
     iniset $KEYSTONE_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL