Add JedisClusterCommand and updated code to use it respectively

src/main/java/redis/clients/jedis/JedisClusterCommand.java

@@ -0,0 +1,23 @@
+package redis.clients.jedis;
+
+import redis.clients.jedis.exceptions.JedisMovedDataException;
+
+public abstract class JedisClusterCommand<T> {
+	
+	private JedisClusterConnectionHandler connectionHandler;
+	
+	public JedisClusterCommand(JedisClusterConnectionHandler connectionHandler) {
+		this.connectionHandler = connectionHandler;
+	}
+
+	public abstract T execute();
+	
+	public T run() {
+		try {
+			return execute();
+		} catch (JedisMovedDataException e) {
+			//TODO: Retry here
+		}
+		return null;
+	}
+}