Python changes:
- limit pip to 20.x as this is last version working on both Python 2 and 3.
- cap 'setuptools' to be older than 58 to have use_2to3 functionality
(fixes 'anyjson' installation)
- upgrade pip in 'elasticsearch-curator' image to get it built on CentOS 7
Unbuildable images:
- 'bifrost-base' under CentOS 8
(Error: Cannot find a valid baseurl for repo: epel)
- 'monasca-grafana' under CentOS 7/8
- 'sensu-client' under CentOS 7
(aws-eventstream requires Ruby version >= 2.3)
- dropped *-upgrade CI jobs as Stein is EOL
- pin 'qpid-proton-c' package for CentOS 7 to not install EPEL one
(cinder-volume, openstack-base and tripleoclient)
- bump 'libvirt-python' in 'masakari-monitors' to 7.10.0
(newer branches install package from distribution but CentOS 7 lacks
it)
- pin 'unf_ext' gem in Sensu images as CentOS 7 lacks Ruby 2.2+
(fixed sensu-server)
- install 'ca-certificates' for newer Let's Encrypt certificates support
(so we can fetch upper-constraints)
- make Zuul fetch openstack/requirements project files
(make 'openstack-base' pass) (like 2nd fix)
Co-Authored-by: Pierre Riteau <pierre@stackhpc.com>
Closes-Bug: #1943617
Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/826464
Change-Id: I8ee32e53cda581493b2a4bb73ca72ab05014b9d4
b22f8f63a3