Since ipa-builder is branchless its code is used directly from master to
test ipa in stable releases.
The iso has been fixed only recently, and since we need to use
ipa-builder version 2.2.0 in stable/ussuri to test, build and publish
the ipa ramdisk, we can't also build an iso in CI or the build job will
As a result we do not buildi an iso for ussuri ironic-python-agent.