public static void createModel(MockRoot root, DeployLogger testLogger, Element... containerElems) {
        createModel(root, DeployState.createTestState(testLogger), null, containerElems);
    }
Utility functions for testing the ContainerModelBuilder. Note that XML validation will
not be done when using this class

@author gjoranv
config-model/src/test/java/com/yahoo/vespa/model/container/xml/ContainerModelBuilderTestBase.java