Update RedisClusterClient build with nodes (#644)

Author: mpalriwal-Netflix

iep-spring-leader-redis-cluster/src/main/java/com/netflix/iep/leader/redis/RedisClusterLeaderClient.java

@@ -53,6 +53,7 @@ public RedisClusterLeaderClient(Config config) {
     clusterProvider = new ClusterConnectionProvider(
         Collections.singleton(hap), clientConfig, poolConfig);
     jedis = RedisClusterClient.builder()
+        .nodes(Collections.singleton(hap))
         .connectionProvider(clusterProvider)
         .clientConfig(clientConfig)
         .build();