com.google.api.client.util.ArrayMap doesn't support iterator remove

[yantzu]

        Map<String, String> am = new ArrayMap<String, String>();
        am.put("a", "a");
        am.put("b", "b");
        am.put("c", "c");
        Iterator<Map.Entry<String,String>> iter = am.entrySet().iterator();
        while (iter.hasNext()) {
            Map.Entry<String,String> entry = iter.next();
            if(!"nid".equalsIgnoreCase((String)entry.getKey())){
                iter.remove();
            }
        }

throw exception:
Exception in thread "main" java.lang.IllegalArgumentException
at com.google.api.client.util.ArrayMap$EntryIterator.remove(ArrayMap.java:390)

[mattwhisenhunt]

Fixed by #371