Generate random keystone users

Change-Id: I8dbd07b10d29b43d1c35fa76bcaa0f0efb32beda
Related-Prod: PROD-29868
diff --git a/keystone/client/v3/service/barbican.yml b/keystone/client/v3/service/barbican.yml
index f008abc..9708bdc 100644
--- a/keystone/client/v3/service/barbican.yml
+++ b/keystone/client/v3/service/barbican.yml
@@ -14,6 +14,7 @@
               enabled: true
           users:
             barbican:
+              name: ${_param:keystone_barbican_username}
               password: ${_param:keystone_barbican_password}
               email: ${_param:admin_email}
               options: ${_param:openstack_service_user_options}