Add nested-virt-ubuntu-focal label

Ubuntu Focal has a newer libvirt version than Bionic (4.0.0 vs 6.0.0).
By adding a Focal-flavored nested-virt label, features made possible
by a more recent libvirt version can be tested in the gate.
Specifically, whitebox-tempest-plugin tests Nova's hw_video_type image
property. Support for the 'none' value was added in libvirt 4.6.0.

Change-Id: Id48fff64d13c258d9f22908debfad86c5f089bf5
Needed-by: https://review.opendev.org/#/c/742014/

nodepool/nl02.openstack.org.yaml

@@ -42,6 +42,8 @@ labels:
     min-ready: 0
   - name: nested-virt-ubuntu-bionic
     min-ready: 0
+  - name: nested-virt-ubuntu-focal
+    min-ready: 0
   - name: nested-virt-centos-7
     min-ready: 0
   - name: nested-virt-centos-8
@@ -153,6 +155,11 @@ providers:
             flavor-name: 'nodepool.0'
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2020-05-13
+          - name: nested-virt-ubuntu-focal
+            min-ram: 8000
+            flavor-name: 'nodepool.0'
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2020-05-13
           - name: nested-virt-centos-7
             min-ram: 8000
             flavor-name: 'nodepool.0'
@@ -240,6 +247,11 @@ providers:
             flavor-name: '8cpu-8GBram-80GBdisk'
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2020-05-13
+          - name: nested-virt-ubuntu-focal
+            min-ram: 8000
+            flavor-name: '8cpu-8GBram-80GBdisk'
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2020-05-13
           - name: nested-virt-centos-7
             min-ram: 8000
             flavor-name: '8cpu-8GBram-80GBdisk'

nodepool/nl03.openstack.org.yaml

@@ -56,6 +56,8 @@ labels:
     min-ready: 0
   - name: nested-virt-ubuntu-bionic
     min-ready: 0
+  - name: nested-virt-ubuntu-focal
+    min-ready: 0
   - name: nested-virt-centos-7
     min-ready: 0
   - name: nested-virt-centos-8
@@ -233,6 +235,11 @@ providers:
             flavor-name: 'osf-highcpu-8'
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2020-05-13
+          - name: nested-virt-ubuntu-focal
+            min-ram: 8000
+            flavor-name: 'osf-highcpu-8'
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2020-05-13
           - name: nested-virt-centos-7
             min-ram: 8000
             flavor-name: 'osf-highcpu-8'
@@ -363,6 +370,13 @@ providers:
             volume-size: 80
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2020-05-13
+          - name: nested-virt-ubuntu-focal
+            min-ram: 8000
+            flavor-name: v2-highcpu-8
+            boot-from-volume: true
+            volume-size: 80
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2020-05-13
           - name: nested-virt-centos-7
             min-ram: 8000
             flavor-name: v2-highcpu-8

nodepool/nl04.openstack.org.yaml

@@ -27,6 +27,8 @@ labels:
   - name: ubuntu-xenial
   - name: nested-virt-ubuntu-bionic
     min-ready: 0
+  - name: nested-virt-ubuntu-focal
+    min-ready: 0
   - name: nested-virt-centos-7
     min-ready: 0
   - name: nested-virt-centos-8
@@ -133,6 +135,11 @@ providers:
             flavor-name: ssd-osFoundation-3
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2020-05-13
+          - name: nested-virt-ubuntu-focal
+            min-ram: 8000
+            flavor-name: ssd-osFoundation-3
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2020-05-13
           - name: nested-virt-centos-7
             min-ram: 8000
             flavor-name: ssd-osFoundation-3