add ignored test for jdt.ui issue 120

[carstenartur]

tbd fix ignore test case provided in
#120

private static <K, V> List<V> method(Map<K, List<V>> map) {
	List<V> results = new ArrayList<>();
	Iterator<List<V>> iterator = map.values().iterator();
	while (iterator.hasNext()) {
		results.addAll(iterator.next());
	}
	return results;
}

What it does

Should allow the code above to be processed using "Only if loop variable used" option

How to test

Test the code shown above from issue 120

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)