Generate test cases for unicode normalizer

NormalizerTestGen.java

import java.text.Normalizer;
import java.util.Random;

import org.apache.lucene.util._TestUtil;

public class NormalizeTestGen {
    public static void main(String[] args){
        String random = org.apache.lucene.util._TestUtil.randomRealisticUnicodeString(new Random());
        System.out.print("NFD.normalize(\"");
        System.out.print(random);
        System.out.print("\").should == \"");
        System.out.print(Normalizer.normalize(random, Normalizer.Form.NFD));
        System.out.println("\"");
  }
}