public String getAppGroupName() {
        return appGroupName;
    }
@Test
    public void testAppGroupNameSystemProp() throws Exception {
        String appGroup = "testAppGroupSystemProp";
        ((ConcurrentCompositeConfiguration) ConfigurationManager.getConfigInstance()).setOverrideProperty("NETFLIX_APP_GROUP",
                appGroup);
        MyDataCenterInstanceConfig config = new MyDataCenterInstanceConfig();
        Assert.assertEquals("Unexpected app group name", appGroup, config.getAppGroupName());
    }