upload manager complete func add sync logic

Author: YangSen-qn

library/src/androidTest/java/com/qiniu/android/DnsCacheFileTest.java

@@ -10,7 +10,7 @@ public class DnsCacheFileTest extends BaseTest {
 
     public void testCreate(){
         try {
-            DnsCacheFile file = new DnsCacheFile("");
+            DnsCacheFile file = new DnsCacheFile(null);
             if (file != null){
                 assertTrue(false);
             }

library/src/main/java/com/qiniu/android/http/dns/DnsCacheFile.java

@@ -16,6 +16,10 @@ public class DnsCacheFile implements Recorder {
     public File f;
 
     public DnsCacheFile(String directory) throws IOException {
+        if (directory == null) {
+            throw new IOException("directory invalid");
+        }
+
         this.directory = directory;
         f = new File(directory);
         if (!f.isDirectory()) {

library/src/main/java/com/qiniu/android/storage/UploadManager.java

@@ -333,12 +333,15 @@ private void completeAction(final String token,
 
         reportQuality(responseInfo, taskMetrics, token);
         if (completionHandler != null){
+            final Wait wait = new Wait();
             AsyncRun.runInMain(new Runnable() {
                 @Override
                 public void run() {
                     completionHandler.complete(key, responseInfo, response);
+                    wait.stopWait();
                 }
             });
+            wait.startWait();
         }
     }