tripleo-ci-centos-7-scenario000-multinode-oooq-container-upgrades queens fails on pip install contextlib2 between 0.5 < 0.6 when queens

[wes hayutin]

2020-06-15 22:53:12.516622 | primary | TASK [build-test-packages : Make sure we have contextlib2 between 0.5 < 0.6 when queens] ***
2020-06-15 22:53:12.516973 | primary | Monday 15 June 2020 22:53:12 +0000 (0:00:09.272) 0:00:24.656 ***********
2020-06-15 22:53:13.602339 | primary | fatal: [subnode-1]: FAILED! => {
2020-06-15 22:53:13.602450 | primary | "changed": false
2020-06-15 22:53:13.602479 | primary | }
2020-06-15 22:53:13.602500 | primary |
2020-06-15 22:53:13.602525 | primary | MSG:
2020-06-15 22:53:13.602545 | primary |
2020-06-15 22:53:13.602671 | primary | Unable to find any of pip2, pip to use. pip needs to be installed.

https://zuul.openstack.org/builds?job_name=tripleo-ci-centos-7-scenario000-multinode-oooq-container-upgrades&branch=stable%2Fqueens

started happening on 6/15
https://zuul.openstack.org/builds?job_name=tripleo-ci-centos-7-scenario000-multinode-oooq-container-upgrades&branch=stable%2Fqueens

[yatin (yatinkarel)]

Around 15 nodepool images were switched to -plain without pip and virtualenv, some other jobs also hit during that time and fixed like https://review.opendev.org/#/c/735810/