Add custom user names for v2 keystone endpoint

Add custom user names for keystone users

Change-Id: Ief64830f1ed8fffd0d970a9b7748f2746f61cce6
Related-Prod: PROD-31315
diff --git a/keystone/client/service/barbican.yml b/keystone/client/service/barbican.yml
index 1a65afd..23bda00 100644
--- a/keystone/client/service/barbican.yml
+++ b/keystone/client/service/barbican.yml
@@ -14,6 +14,7 @@
             service:
               user:
                 barbican:
+                  name: ${_param:keystone_barbican_username}
                   password: ${_param:keystone_barbican_password}
                   email: ${_param:admin_email}
                   options: ${_param:openstack_service_user_options}