@Test
    public void applicationid_from_zone_confg_server_appref_is_working() throws Exception {
        ApplicationId appId = OrchestratorUtil.toApplicationId(APPREF_2);
        Assert.assertEquals(ApplicationId.from(
                TenantName.from("hosted-vespa"),
                ApplicationName.from("zone-config-servers"),
                InstanceName.defaultName()),appId);
    }
Here we don't care how the internal of the different application
id/reference look like as long as we get back to exactly where we
started from a round trip. I.e I'm not testing validity of the
different representations.
orchestrator/src/test/java/com/yahoo/vespa/orchestrator/OrchestratorUtilTest.java