@Test
    void security_clients_pem_is_picked_up() {
        var applicationPackage = new MockApplicationPackage.Builder()
                .withRoot(applicationFolder)
                .build();

        applicationPackage.getFile(Path.fromString("security")).createDirectory();
        applicationPackage.getFile(Path.fromString("security/clients.pem")).writeFile(new StringReader("I am a very nice certificate"));

        var deployState = DeployState.createTestState(applicationPackage);

        Element clusterElem = DomBuilderTest.parse("<container version='1.0' />");

        createModel(root, deployState, null, clusterElem);
        assertEquals(Optional.of("I am a very nice certificate"), getContainerCluster("container").getTlsClientAuthority());
    }
@author gjoranv
@author bjorncs
@author mortent
config-model/src/test/java/com/yahoo/vespa/model/container/xml/AccessControlTest.java