SO003_12: added new attribute to ExtLinkPortData datamodel

src/definitions/SOL002SOL003_def.yaml

@@ -742,6 +742,15 @@ definitions:
           Reference to the virtualised resource realizing this link port.
         $ref: "#/definitions/ResourceHandle"
 
+      trunkResourceId:
+        description: >
+          Identifier of the trunk resource in the VIM.
+          Shall be present if the present link port corresponds to the parent
+          port that the trunk resource is associated with.
+          The value of \"trunkResourceId\" is scoped by the value of
+          \"vimConnectionId\" in the \"resourceHandle\" attribute.
+        $ref: "#/definitions/IdentifierInVim"
+
   GrantedLcmOperationType:
     description: >
       The enumeration GrantedLcmOperationType defines the permitted values