Generate random keystone users

Change-Id: I8dbd07b10d29b43d1c35fa76bcaa0f0efb32beda
Related-Prod: PROD-29868
diff --git a/keystone/client/v3/service/congress.yml b/keystone/client/v3/service/congress.yml
index 0d34181..936f71c 100644
--- a/keystone/client/v3/service/congress.yml
+++ b/keystone/client/v3/service/congress.yml
@@ -7,6 +7,7 @@
         v3:
           users:
             congress:
+              name: ${_param:keystone_congress_username}
               password: ${_param:keystone_congress_password}
               email: ${_param:admin_email}
               options: ${_param:openstack_service_user_options}