This version of NormalizedNodePruner is reusable across invocations,
and improving CPU and memory efficiency in bulk operations due to
not needing to allocate stack nor lookup DataSchemaContextTree.
JIRA: CONTROLLER-1887
Change-Id: I1798f5f6255cd23702bf3792c1f4f5149f92d208
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit
7bef3c9e3f411d3e4abdb5ff43a618537cc9c936)