Exception: TokenStream implementation classes or at least their incrementToken() implementation must be final, closes elastic#1397.

Author: kimchy

modules/elasticsearch/src/main/java/org/elasticsearch/index/analysis/NumericTokenizer.java

@@ -61,7 +61,7 @@ public void reset(Reader input, char[] buffer) throws IOException {
         numericTokenStream.reset();
     }
 
-    @Override public boolean incrementToken() throws IOException {
+    @Override public final boolean incrementToken() throws IOException {
         return numericTokenStream.incrementToken();
     }