Adjust tests to check that updating a received share is forbidden
Adjust tests to check that updating a received share is forbidden

Updating a received share is no longer allowed by the server, so the
integration tests have to be adjusted to the new behaviour.

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed