SLING-3653 - 'Child node ordering not supported' when republishing tree

Slightly rework the previous fix by ensuring that we descend down the
covered resource hierarchy even if the current node does not have
orderable child nodes.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1602454 13f79535-47bb-0310-9956-ffa450edef68