Bug 868 - Fixed

NSD and VNFD items with schema type list containing same identifiers are truncated and used without error.
Fix essentially makes a depth traversal of the JSON object and
uses Id or Name of object to uniquely identify object. Key Id takes precedence over Name.

Change-Id: I534c96fb573b651cca71f0309e1a912d6b5889da
Signed-off-by: K Sai Kiran <saikiran.k@tataelxsi.co.in>