issue #61 Implementation of Enh02.05 from IFA011ed421

Signed-off-by: Preethika <preethika.p@tataelxsi.co.in>

src/yang/etsi-nfv-vnf.yang

@@ -2356,6 +2356,18 @@ submodule etsi-nfv-vnf {
               "GS NFV IFA011: Section 7.1.5.3
                InstantiateVnfOpConfig information element";
           }
+
+          leaf target-scale-levels-supported {
+            type boolean;
+            default false;
+            description
+              "Signals whether target scale levels are supported
+               by this VNF during instantiation.
+               Default is FALSE, i.e. \"not supported\".";
+            reference
+              "GS NFV IFA011: Section 7.1.5.3
+               InstantiateVnfOpConfig information element";
+          }
           description
             "Configuration parameters for the InstantiateVnf
              operation.";