Fix Bug 2229 Set fixed IP address for VDU through VNFD and the instantiation params

Change-Id: Ia912cd52a0965a6c2b23faa2b88d9b4d0569fd3f
Signed-off-by: Gulsum Atici <gulsum.atici@canonical.com>
diff --git a/osm_nbi/instance_topics.py b/osm_nbi/instance_topics.py
index 8cc7106..1771b5e 100644
--- a/osm_nbi/instance_topics.py
+++ b/osm_nbi/instance_topics.py
@@ -919,7 +919,7 @@
                     # Name, mac-address and interface position is taken from VNFD
                     # and included into VNFR. By this way RO can process this information
                     # while creating the VDU.
-                    iface_fields = ("name", "mac-address", "position")
+                    iface_fields = ("name", "mac-address", "position", "ip-address")
                     vdu_iface = {
                         x: iface[x] for x in iface_fields if iface.get(x) is not None
                     }
@@ -1558,8 +1558,8 @@
             ivld.get("id"): set()
             for ivld in get_iterable(vnfd.get("int-virtual-link-desc"))
         }
-        for vdu in get_iterable(vnfd.get("vdu")):
-            for cpd in get_iterable(vnfd.get("int-cpd")):
+        for vdu in vnfd.get("vdu", {}):
+            for cpd in vdu.get("int-cpd", {}):
                 if cpd.get("int-virtual-link-desc"):
                     vnfd_ivlds_cpds[cpd.get("int-virtual-link-desc")] = cpd.get("id")