Description of problem:

RHOS 16.2 overcloud and IPA image builds are failing with:


"msg": "Failed to download packages: Cannot download python3-metalsmith-0.15.1-0.20200720234727.0afed74.el8ost.noarch.rpm: All mirrors were tried",


2020-11-03 16:41:07.209769 | TASK [oooci-build-images : Install python-tripleoclient for Image build]
2020-11-03 16:41:13.877197 | primary | ERROR
2020-11-03 16:41:13.877656 | primary | {
2020-11-03 16:41:13.877709 | primary |   "msg": "Failed to download packages: Cannot download python3-metalsmith-0.15.1-0.20200720234727.0afed74.el8ost.noarch.rpm: All mirrors were tried",
2020-11-03 16:41:13.877745 | primary |   "results": []
2020-11-03 16:41:13.877778 | primary | }

Full output logs are below:
https://sf.hosted.upshift.rdu2.redhat.com/logs/10/207510/62/check/periodic-tripleo-rhel-8-buildimage-overcloud-full-rhos-16.2/c24f416/job-output.txt

https://sf.hosted.upshift.rdu2.redhat.com/logs/10/207510/62/check/periodic-tripleo-rhel-8-buildimage-ironic-python-agent-rhos-16.2/0cb77ce/job-output.txt