Removed JVM settings show up as empty resources

[domain@localhost:9999 /] /host=local/server-config=server-three:read-resource(recursive=1)
{
"outcome" => "success",
"result" => {
"path" => undefined,
"system-property" => undefined,
"interface" => undefined,
"jvm" => {},
"socket-binding-group" => "standard-sockets",
"socket-binding-port-offset" => 250,
"name" => "server-three",
"group" => "other-server-group",
"auto-start" => false
},
"compensating-operation" => undefined
}

this blows up the UI, since it cannot distinguish between non-existing and configured jvm subresources anymore. Actually the jvm attribute should UNDEFINED in this case.