Refactor OpenStack services to use default OkCodes
diff --git a/openstack/objectstorage/v1/accounts/requests.go b/openstack/objectstorage/v1/accounts/requests.go
index 3e404c3..a645115 100644
--- a/openstack/objectstorage/v1/accounts/requests.go
+++ b/openstack/objectstorage/v1/accounts/requests.go
@@ -95,7 +95,7 @@
 
 	resp, err := c.Request("POST", updateURL(c), gophercloud.RequestOpts{
 		MoreHeaders: h,
-		OkCodes:     []int{204},
+		OkCodes:     []int{201, 202, 204},
 	})
 	res.Header = resp.Header
 	res.Err = err