Rolling back r1161378. NullComparator and ReverseComparator need the NATURAL_COMPARATOR field and the ComparableComparator.INSTANCE field is not a straight replacement

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1161605 13f79535-47bb-0310-9956-ffa450edef68
1 file changed