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/billometer.yml b/keystone/client/service/billometer.yml
index 14c570e..002ca9b 100644
--- a/keystone/client/service/billometer.yml
+++ b/keystone/client/service/billometer.yml
@@ -11,6 +11,7 @@
             service:
               user:
                 billometer:
+                  name: ${_param:keystone_billometer_username}
                   is_admin: true
                   password: ${_param:keystone_billometer_password}
                   email: ${_param:admin_email}