simplify colorized logging setup

This makes setup_colorized_logging be a thing which takes a single
parameter and doesn't let projects do things differently. It also
changes the order of values from user / project to project / user to
represent the hierachy more clearly.

Change-Id: I8c0ba7da54be588e3e068734feb4f78ed7c5a14a
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 29c187e..cf59b2d 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -733,7 +733,7 @@
 
     # Format logging
     if [ "$LOG_COLOR" == "True" ] && [ "$SYSLOG" == "False" ]; then
-        setup_colorized_logging $NEUTRON_CONF DEFAULT project_id
+        setup_colorized_logging $NEUTRON_CONF
     else
         # Show user_name and project_name by default like in nova
         iniset $NEUTRON_CONF DEFAULT logging_user_identity_format "%(user_name)s %(project_name)s"