Update Ubuntu20 Azure image for new packages using the right URN

Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

ipprofile_2vm_vnf/ipprofile_2vm_vnfd.yaml

@@ -37,7 +37,7 @@ vnfd:
     name: ubuntu20.04
   - id: ubuntu20.04-azure
     name: ubuntu20.04-azure
-    image: Canonical:UbuntuServer:20.04-LTS:latest
+    image: Canonical:0001-com-ubuntu-server-focal:20_04-lts:latest
     vim-type: azure
   vdu:
   - id: mgmtVM

several_volumes_vnf/several_volumes_vnfd.yaml

@@ -28,7 +28,7 @@ vnfd:
     vim-type: aws
   - id: ubuntu20.04-azure
     name: ubuntu20.04-azure
-    image: Canonical:UbuntuServer:20.04-LTS:latest
+    image: Canonical:0001-com-ubuntu-server-focal:20_04-lts:latest
     vim-type: azure
   vdu:
   - id: several_volumes-VM

simple_2vm_vnf/simple_2vm_vnfd.yaml

@@ -30,7 +30,7 @@ vnfd:
     name: ubuntu20.04
   - id: ubuntu20.04-azure
     name: ubuntu20.04-azure
-    image: Canonical:UbuntuServer:20.04-LTS:latest
+    image: Canonical:0001-com-ubuntu-server-focal:20_04-lts:latest
     vim-type: azure
   vdu:
   - id: mgmtVM

ubuntu_4ifaces_vnf/ubuntu_4ifaces_vnfd.yaml

@@ -36,7 +36,7 @@ vnfd:
     name: ubuntu20.04
   - id: ubuntu20.04-azure
     name: ubuntu20.04-azure
-    image: Canonical:UbuntuServer:20.04-LTS:latest
+    image: Canonical:0001-com-ubuntu-server-focal:20_04-lts:latest
     vim-type: azure
   vdu:
   - cloud-init-file: cloud-config.txt