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
skipsdist and usedevelop are incompatible in tox 4.
Setting tox < 4 in .zuul.yaml rather than trying to
figure out why the sysinv component is not properly
installing in tox.
Partial-Bug: #1997255
Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: If8e339d20e57e0830ea4ce27c098bacfef2f2ef8
94034b91f9