Use focal amphora test image by default

Switch used default amphora image from bionic to focal

Change-Id: I5a05f583631ef7b6429da4a6a3a4e895e9c75163
(cherry picked from commit c7a7a14f7b)

defaults/main.yml

@@ -239,7 +239,7 @@ octavia_amp_image_owner_id:
 # Note: The default is the Octavia test image so don't use that in prod
 octavia_download_artefact: True
 # The URL to download from
-octavia_artefact_url: http://tarballs.openstack.org/octavia/test-images/test-only-amphora-x64-haproxy-ubuntu-bionic.qcow2
+octavia_artefact_url: http://tarballs.openstack.org/octavia/test-images/test-only-amphora-x64-haproxy-ubuntu-focal.qcow2
 # Set the directory where the downloaded image will be stored
 # on the octavia_service_setup_host host. If the host is localhost,
 # then the user running the playbook must have access to it.

tox.ini

@@ -23,7 +23,7 @@ passenv =
     TESTING_BRANCH
     TESTING_HOME
     USER
-whitelist_externals =
+allowlist_externals =
     bash
 setenv =
     PYTHONUNBUFFERED=1
@@ -40,7 +40,7 @@ commands =
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
-whitelist_externals =
+allowlist_externals =
   make
 commands =
   sphinx-build -W --keep-going -b latex doc/source doc/build/pdf