Feature 10975: adds vim-flavor-id to ns_instantiate_vdu schema

Change-Id: Ib638fa9d29f3899bcc4609634d3a99e485152e5d
Signed-off-by: Gabriel Cuba <gcuba@whitestack.com>
diff --git a/osm_nbi/validation.py b/osm_nbi/validation.py
index 33ede77..e5c2a03 100644
--- a/osm_nbi/validation.py
+++ b/osm_nbi/validation.py
@@ -137,6 +137,7 @@
     "type": "object",
     "properties": {
         "id": name_schema,
+        "vim-flavor-id": name_schema,
         "volume": {
             "type": "array",
             "minItems": 1,