Update of top-level data node fails with SQL error

The error is caused by the fetch-descendants code using
ResultSet.getLong which returns a 'long' primitive instead
of a 'Long' object. Thus a parent ID of 'NULL' becomes '0',
which causes an error during update. To preserve the NULL
value, ResultSet.getObject must be used.

Issue-ID: CPS-1841
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: Ida6837a04954cd3c23f0f2faabd7d0712d8ee19d
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index cd70cf8..3f672ad 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -39,6 +39,7 @@
 Bug Fixes
 ---------
 3.3.6
+    - `CPS-1841 <https://jira.onap.org/browse/CPS-1841>`_ Update of top-level data node fails with exception
 
 Features
 --------