Use YangParserFactory to generate schema context

This is presented as a fix for ClassDefNotFoundErrors
from opendaylight yang parser

Issue-ID: CPS-1866
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: If2d1a8f0319cad0a9517ea3652446e2e43f51fd4
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 013617a..cd7ea80 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -39,6 +39,7 @@
 Bug Fixes
 ---------
 3.3.7
+    - `CPS-1866 <https://jira.onap.org/browse/CPS-1866>`_ Fix ClassDefNotFoundError in opendaylight Yang parser
 
 Features
 --------