MINOR: checkstyle

Signed-off-by: Lev Zemlyanov <lev@confluent.io>

Author: Lev Zemlyanov

src/main/java/io/confluent/connect/elasticsearch/jest/JestElasticsearchClient.java

@@ -234,7 +234,7 @@ private boolean indexExists(String index) {
     try {
       JestResult result = client.execute(action);
       boolean exists = result.isSucceeded();
-      if(exists) {
+      if (exists) {
         indexCache.add(index);
       }
       return exists;