feature 1417 PDU: Instantiation parameters. Instantiation checking, look for proper PDU. Fix vnfr generation with vdu.count>1

Change-Id: I1ba1da03ac6a5fe15ecf5ceaab49049e5dca1106
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_nbi/validation.py b/osm_nbi/validation.py
index 6999435..861bc74 100644
--- a/osm_nbi/validation.py
+++ b/osm_nbi/validation.py
@@ -196,6 +196,7 @@
         "vimAccountId": id_schema,
         "ssh_keys": {"type": "array", "items": {"type": "string"}},
         "nsr_id": id_schema,
+        "vduImage": name_schema,
         "vnf": {
             "type": "array",
             "minItems": 1,