Comment 2 for bug 1820892

From the grenade logs:

2019-03-19 15:58:12.552 | Check python version for : etcd3gw
2019-03-19 15:58:13.601 | + inc/python:pip_install:349 : local install_test_reqs=
2019-03-19 15:58:13.604 | + inc/python:pip_install:350 : local test_req=etcd3gw/test-requirements.txt
2019-03-19 15:58:13.606 | + inc/python:pip_install:351 : [[ -e etcd3gw/test-requirements.txt ]]
2019-03-19 15:58:13.609 | + inc/python:pip_install:359 : sudo -H http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite /usr/local/bin/pip2.7 install -c /opt/stack/old/requirements/upper-constraints.txt etcd3gw