Elasticsearch 5: Remove extraneous newline

This commit removes an extraneous newline from
ElasticsearchRestClient.java.

elasticsearch5/src/main/java/com/yahoo/ycsb/db/elasticsearch5/ElasticsearchRestClient.java

@@ -412,7 +412,6 @@ public class ElasticsearchRestClient extends DB {
     }
   }
 
-
   private Response search(final String table, final String key) throws IOException {
     try (XContentBuilder builder = jsonBuilder()) {
       builder.startObject();