SOL003_31: added new attributes to ResourceDefinition datamodel and added note

src/SOL003/VNFLifecycleOperationGranting/definitions/SOL003VNFLifecycleOperationGranting_def.yaml

@@ -458,6 +458,18 @@ definitions:
             - if type="LINKPORT" : VnfExtCpd
             - if type="STORAGE" : VirtualStorageDesc
         $ref: "../../../definitions/SOL002SOL003_def.yaml#/definitions/IdentifierInVnfd"
+      secondaryResourceTemplateId:
+        description: >
+          Reference to a secondary resource template (VnfExtCpd) in the VNFD.
+          Shall be present if type="LINKPORT" and the linkport is shared by two external
+          CP instances, one exposing a VNFC CP instance (based on a VnfExtCpd referenced
+          by "resourceTemplateId") and another one exposing a VIP CP instance (based on a
+          VnfExtCpd referenced by this attribute). Shall be absent otherwise.
+
+          The use cases UC#4 and UC#5 in Annex A.4 of ETSI GS NFV-IFA 007 [1] provide examples for such a configuration.
+
+        $ref: "../../../definitions/SOL002SOL003_def.yaml#/definitions/IdentifierInVnfd"
+
       resource:
         description: >
           Resource information for an existing resource. Shall be present for