This change will allow this repo to pass zuul now
that this has merged:
https://review.opendev.org/c/zuul/zuul-jobs/+/866943
Tox 4 deprecated whitelist_externals.
Replace whitelist_externals with allowlist_externals
Partial-Bug: #2000399
Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: I2d40cb08381b3fe9dc404c70213456c306424c6a