crm cluster health uses platform.linux_distribution, dropped in python 3.8

Reported upstream at https://github.com/ClusterLabs/crmsh/issues/879

This bug was filed while triaging https://bugs.launchpad.net/ubuntu/+source/crmsh/+bug/1687095. Therefore, I am changing the importance to low, to match that bug's importance.

This is still not fixed upstream. This is the PR containing the fix:

https://github.com/ClusterLabs/crmsh/pull/883

This has landed upstream, but has not been released yet.

Since there is a feature change in the fixing PR, I am not sure backporting it would be fit for an SRU. One alternative would be to replicate the utillib.get_distro_info() behavior in scripts/health/collect.py to substitute the deprecated command. This would mimic the behavior change applied upstream. While this would introduce a change in the data presented by the failing command (it would remove 2 fields from it), it seems reasonable given that currently, the command does not work at all for series >= 20.04.

This bug was fixed in the package crmsh - 4.2.1-3ubuntu2

---------------
crmsh (4.2.1-3ubuntu2) jammy; urgency=medium

  * New changes:
    - d/p/0017-Fix-health-scripts-python-38-support.patch: remove deprecated
      function usage (LP: #1947022).
    - d/p/0018-Replace-crmd.patch: replace crmd calls with pacemaker-controld
      (LP: #1958241).
    - d/t/testsuite.sh: set timezone for time conversion tests (LP: #1958243).
    - d/p/0019-Add-hb_report-dpkg-support.patch: add dpkg support to hb_report
      (LP: #1958246).
    - d/p/0020-Use-crmsh-hb_report.patch: use the crmsh shipped hb_report script
      when available (LP: #1958247).

 -- Athos Ribeiro <email address hidden> Fri, 07 Jan 2022 10:14:32 -0300