update ignore test

webmagic-extension/src/test/java/us/codecraft/webmagic/downloader/FileCacheTest.java

@@ -1,5 +1,6 @@
 package us.codecraft.webmagic.downloader;
 
+import org.junit.Ignore;
 import org.junit.Test;
 import us.codecraft.webmagic.Spider;
 
@@ -8,7 +9,7 @@ import us.codecraft.webmagic.Spider;
  */
 public class FileCacheTest {
 
-//    @Ignore("takes long")
+    @Ignore("takes long")
     @Test
     public void test() {
         FileCache fileCache = new FileCache("http://my.oschina.net/flashsword/blog", "http://my.oschina.net/flashsword/blog/*");