Merge pull request #259 from zshbleaker/master

Add more check for UploadManager

Author: jemygraw

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

@@ -155,7 +155,9 @@ public void onSuccess() {
 
             @Override
             public void onFailure(int reason) {
-                final ResponseInfo info = ResponseInfo.invalidToken("invalid token");
+                final ResponseInfo info = ResponseInfo.isStatusCodeForBrokenNetwork(reason) ?
+                        ResponseInfo.networkError(reason, decodedToken) :
+                        ResponseInfo.invalidToken("invalid token");
                 completionHandler.complete(key, info, null);
             }
         });