Fix keystone client v3 metadata for some services

This patch fixes metadata for keystone v3 client in the
following services:
  ironic
  radosgw-swift
  radosgw-s3

Change-Id: I8c8cd046079e3692b33e54159b464b80530f6763
diff --git a/keystone/client/v3/service/radosgw-s3.yml b/keystone/client/v3/service/radosgw-s3.yml
index 25614cb..d069d9e 100644
--- a/keystone/client/v3/service/radosgw-s3.yml
+++ b/keystone/client/v3/service/radosgw-s3.yml
@@ -15,7 +15,7 @@
                 service_admin:
                   name: admin
                   project_id: service
-          service:
+          services:
             radosgw-s3:
               type: s3
               description: S3 Service (radosgw)