Providing --path option to transfer-ownership

This will help user to selectively move the folders
specified using --path option, instead of moving
entire folder under files directory.

Signed-off-by: Sujith H <sharidasan@owncloud.com>

Update the integration test for transfer-ownership

Update the integration test for transfer-ownership
as the new option --path is introduced in the command.

Signed-off-by: Sujith H <sharidasan@owncloud.com>
Signed-off-by: Morris Jobke <hey@morrisjobke.de>