Merge pull request #671 from AllenConquest/dev

If an error is available during upload report this in the ClientExcep…

Author: baywet

src/main/java/com/microsoft/graph/requests/extensions/ChunkedUploadRequest.java

@@ -111,8 +111,8 @@ public <UploadType> ChunkedUploadResult<UploadType> upload(
 
         if (result != null && result.chunkCompleted()) {
             return result;
-        } else 
+        } else
             return new ChunkedUploadResult<UploadType>(
-                new ClientException("Upload session failed.", null));
+                new ClientException("Upload session failed.", result == null ? null : result.getError()));
     }
-}
+}