copy file instead of renaming it. (#11908)

* copy file instead of renaming it.

As stated in thread; fixes #5050

* Update GeoIPAutoUpdater.php

In most cases the rename is successful, in rare cases the rename cannot be completed. In those cases we do a copy, leaving the $tempFile in place, it will be overwritten during the next  GeoIPAutopudater task.

Tested in both windows and Ubuntu environment.

* Add unlink