SLING-3710 - Incorrect handling of nt:hierarchyNode instances nested
within jcr:content nodes of other nt:hieararchyNode node

Corrected ResourceProxy.get and ResourceProxy.covers for nodes nested
more than two levels deep beyond the covering node.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1607845 13f79535-47bb-0310-9956-ffa450edef68
SLING-3710 - Incorrect handling of nt:hierarchyNode instances nested
within jcr:content nodes of other nt:hieararchyNode node

Add more tracing to ResourceChangeCommandFactory when looking for parent
covering nodes.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1607846 13f79535-47bb-0310-9956-ffa450edef68