periodic containers build push jobs master & train broken distutils.errors.DistutilsError: `allow-hosts` option not supported

In [1][2] for train and [3][4] for master the container build push job failed with trace like:

        2019-11-24 21:20:55.088816 | TASK [build-containers : pip install kolla]
        2019-11-24 21:21:11.538232 | primary | ERROR
        2019-11-24 21:21:11.538774 | primary | {
        2019-11-24 21:21:11.538869 | primary | "msg": "stdout: Already using interpreter /usr/bin/python\n No LICENSE.txt / LICENSE found in source\nNew python executable in /home/zuul/workspace/venv_build/bin/python\nPlease make sure you remove any previous custom paths from your /home/zuul/.pydistutils.cfg file.\nInstalling setuptools, pip, wheel...\ndone.\nLooking in indexes: http://mirror.regionone.rdo-cloud-tripleo.rdoproject.org/pypi/simple, http://mirror.regionone.rdo-cloud-tripleo.rdoproject.org/wheel/centos-7.7-x86_64\nProcessing /home/zuul/src/opendev.org/openstack/kolla\n\n:stderr: DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support\n ERROR: Command errored out with exit status 1:\n command: /home/zuul/workspace/venv_build/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '\"'\"'/tmp/pip-req-build-pcTIhw/setup.py'\"'\"'; __file__='\"'\"'/tmp/pip-req-build-pcTIhw/setup.py'\"'\"';f=getattr(tokenize, '\"'\"'open'\"'\"', open)(__file__);code=f.read().replace('\"'\"'\\r\\n'\"'\"', '\"'\"'\\n'\"'\"');f.close();exec(compile(code, __file__, '\"'\"'exec'\"'\"'))' egg_info --egg-base /tmp/pip-req-build-pcTIhw/pip-egg-info\n cwd: /tmp/pip-req-build-pcTIhw/\n Complete output (21 lines):\n Traceback (most recent call last):\n File \"<string>\", line 1, in <module>\n File \"/tmp/pip-req-build-pcTIhw/setup.py\", line 29, in <module>\n pbr=True)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/setuptools/__init__.py\", line 144, in setup\n _install_setup_requires(attrs)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/setuptools/__init__.py\", line 139, in _install_setup_requires\n dist.fetch_build_eggs(dist.setup_requires)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/setuptools/dist.py\", line 721, in fetch_build_eggs\n replace_conflicting=True,\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/pkg_resources/__init__.py\", line 782, in resolve\n replace_conflicting=replace_conflicting\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/pkg_resources/__init__.py\", line 1065, in best_match\n return self.obtain(req, installer)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/pkg_resources/__init__.py\", line 1077, in obtain\n return installer(requirement)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/setuptools/dist.py\", line 777, in fetch_build_egg\n return fetch_build_egg(self, req)\n File \"/home/zuul/workspace/venv_build/lib/python2.7/site-packages/setuptools/installer.py\", line 74, in fetch_build_egg\n raise DistutilsError('the `allow-hosts` option is not supported '\n distutils.errors.DistutilsError: the `allow-hosts` option is not supported when using pip to install requirements.\n ----------------------------------------\nERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.\n"
        2019-11-24 21:21:11.538957 | primary | }

master and train promotion blocker but it looks like it may be fixed by [5]

[1] http://logs.rdoproject.org/openstack-periodic-latest-released/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-centos-7-train-containers-build-push/91c22e7/job-output.txt
[2] http://logs.rdoproject.org/openstack-periodic-latest-released/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-centos-7-train-containers-build-push/7b1eeee/job-output.txt
[3] http://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-centos-7-master-containers-build-push/1840f1d/job-output.txt
[4] http://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-centos-7-master-containers-build-push/b073071/job-output.txt
[5] https://review.opendev.org/#/c/695821/