Remove the default project from all users

The default project means that a user gains token scoping information
for a project if they don't specify another. This is something we want
to discourage for user creation. User's should specify there own
authentication scope when they authenticate.

Change-Id: I42c3060d59edfcd44d04cd166bad500419dd99bc
diff --git a/lib/tempest b/lib/tempest
index 1ae9457..86f30b4 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -502,7 +502,7 @@
         # Tempest has some tests that validate various authorization checks
         # between two regular users in separate tenants
         get_or_create_project alt_demo
-        get_or_create_user alt_demo "$ADMIN_PASSWORD" alt_demo "alt_demo@example.com"
+        get_or_create_user alt_demo "$ADMIN_PASSWORD" "alt_demo@example.com"
         get_or_add_user_role Member alt_demo alt_demo
     fi
 }