Added case for MapNode interface in transformNormalizedNode() method
Issue-ID: NETCONF-538 Signed-off-by: Mario Abraham <mario.abraham@pantheon.tech>
Change-Id: I9fa1d7f364d3d68d715aab73473096795da4ed6b
(cherry picked from commit ca7514e21fca4d18104d5a09d547d540a32d2e2e)