@Test
    public void testDefaultConfig() {
        ConfigSubscriber subscriber = new ConfigSubscriber();
        ConfigHandle<DefaulttestConfig> h = subscriber.subscribe(DefaulttestConfig.class, CONFIG_ID);
        assertTrue(subscriber.nextConfig(false));
        DefaulttestConfig config = h.getConfig();
        verifyConfigValues(config);
        subscriber.close();
    }
Reads a config from a string which is exactly like one returned from
the config server given only default values for this config.
The parsing code is the same whether the reading happens from string
or from a server connection, so this tests that this config can be
received correctly from the server
config/src/test/java/com/yahoo/config/subscription/DefaultConfigTest.java