We updated publish-to-pypi so that it has the same content as
publish-to-pypi-python3 - and then replaced publish-to-pypi-python3 with
publish-to-pypi. Thus, publish-to-pypi does what publish-to-pypi-python3
has done previously.
Since all repos have been updated to use publish-to-pypi, check for that
one again.
Change-Id: I09ed2370a4d1f1bfb94cf73a951d0f1f6af36be6
Depends-On: https://review.openstack.org/615239