Updated hackfest_multivdu_vnf: changed image from US1604 to ubuntu20.04

Updated image used in VNF to Ubuntu 20.04.

hackfest_multivdu_vnf/hackfest_multivdu_vnfd.yaml

@@ -29,9 +29,9 @@ vnfd:
   mgmt-cp: vnf-mgmt-ext
   product-name: hackfest_multivdu-vnf
   sw-image-desc:
-  - id: US1604
-    image: US1604
-    name: US1604
+  - id: ubuntu20.04
+    image: ubuntu20.04
+    name: ubuntu20.04
   vdu:
   - id: mgmtVM
     int-cpd:
@@ -49,7 +49,7 @@ vnfd:
         virtual-interface:
           type: PARAVIRT
     name: mgmtVM
-    sw-image-desc: US1604
+    sw-image-desc: ubuntu20.04
     virtual-compute-desc: mgmtVM-compute
     virtual-storage-desc:
     - mgmtVM-storage
@@ -69,7 +69,7 @@ vnfd:
         virtual-interface:
           type: PARAVIRT
     name: dataVM
-    sw-image-desc: US1604
+    sw-image-desc: ubuntu20.04
     virtual-compute-desc: dataVM-compute
     virtual-storage-desc:
     - dataVM-storage