1. Site1 is created;
2. Documant Library of Site1 is opened;
3. Click Upload button;
4. Click Browse button;
5. Select non-empty file and click Open button.
6. Click "Upload Files" button;
File is successfully uploaded. "Ok" button is visible, you can click it and
user goes to "Document library" page and file is present in listed items.
Authentication window is displayed