Drop keystone dedicated ports

Those historic references to port 5000 and 35357 aren't being used
anymore for some time, so let us drop them.

Clean up some python2/3 wording along the way.

No longer mention Identity API v2, which is also a thing of the past.

Change-Id: Iafff097eee082f24ea2ae27ad038ad115aa36c61
diff --git a/tools/create_userrc.sh b/tools/create_userrc.sh
index f4a4edc..c7bea4a 100755
--- a/tools/create_userrc.sh
+++ b/tools/create_userrc.sh
@@ -152,7 +152,7 @@
 fi
 
 if [ -z "$OS_AUTH_URL" ]; then
-    export OS_AUTH_URL=http://localhost:5000/v3/
+    export OS_AUTH_URL=http://localhost/identity/v3/
 fi
 
 if [ -z "$OS_USER_DOMAIN_ID" -a -z "$OS_USER_DOMAIN_NAME" ]; then