test(ResourcesUtil): Use actual ServicesList for CompositeState
test(ResourcesUtil): Use actual ServicesList for CompositeState

An error was hidden because the test used an array mock in place of `ServicesList`, which is a n actual dependency of `CompositeState`.

I added a second mock that triggers the exception when there are no Node items

dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui