server-group:add operation ignores socket-binding-group parameter

[localhost:9999 /] /server-group=heiko-group:add(profile=default, socket-binding-group=standard-sockets)
{
"outcome" => "success",
"result" => undefined,
"compensating-operation" =>

{ "operation" => "remove", "address" => [("server-group" => "heiko-group")] }

}

[localhost:9999 /] /server-group=heiko-group:read-resource
{
"outcome" => "success",
"result" => {
"profile" => "default",
"jvm" => {},
"deployment" => {}
},
"compensating-operation" => undefined
}