python-designateclient > 3.0.0 has no v1 client, but helper/setup/image_setup.py requires a v1 client

[Alex Kavanagh]

image_setup.py run fro next_designate_ha

2021-04-14 11:50:35 [ERROR] Traceback (most recent call last):
  File "/srv/mojo/openstack/bionic/_20210314_100318/spec/specs/full_stack/next_designate_ha/queens/image_setup.py", line 4, in <module>
    import utils.mojo_os_utils as mojo_os_utils
  File "/mnt/mojo/openstack/bionic/_20210314_100318/spec/helper/setup/utils/mojo_os_utils.py", line 10, in <module>
    import designateclient.v1.domains as des_domains
ModuleNotFoundError: No module named 'designateclient.v1'

This means that whilst it can run on xenial (the default for mojo testing), it can't run on bionic as the py3-client-requirements.txt file in charm-test-infra allows >3.0.0 for python-designateclient which drops the v1 client.

It will either need to be re-written to use either v1 or v2 or just the v2 client.