private static ComponentNode mockComponentNode(Class<?> clazz, String componentId, String configId) {
        return new ComponentNode(new ComponentId(componentId), configId, clazz);
    }
@author gjoranv
@author Tony Vaagenes
@author ollivir
container-core/src/test/java/com/yahoo/container/di/componentgraph/core/ReuseComponentsTest.java