upload: use copy without metadata if the file cannot be renamed

... to transfer the upload to its target directory.  For some reason, a
plain shutil.move call would fail on the OSH production hub with SELinux
enabled with a Permission denied error due to some relabelling problems.
However, copying without metadata works fine and it should not introduce
any regressions.

Related: openscanhub/openscanhub#180

kobo/django/upload/views.py

@@ -77,7 +77,7 @@ def file_upload(request):
     if not os.path.isdir(upload.target_dir):
         os.makedirs(upload.target_dir)
 
-    shutil.move(tmp_file_name, upload.target_dir)
+    shutil.move(tmp_file_name, upload.target_dir, copy_function=shutil.copy)
     shutil.rmtree(tmp_dir)
 
     upload.state = UPLOAD_STATES["FINISHED"]