the tests for this charm can't be run on Focal

[Chris MacNaughton]

the unit tests end up doing an import time Version detection which breaks when charmhelpers doesn't understand the running series.

Traceback (most recent call last):
  File "/usr/lib/python3.7/unittest/loader.py", line 436, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.7/unittest/loader.py", line 377, in _get_module_from_name
    __import__(name)
  File "/home/chris/code/canonical/charms/ceph-mon/unit_tests/test_upgrade.py", line 2, in <module>
    from ceph_hooks import check_for_upgrade
  File "hooks/ceph_hooks.py", line 25, in <module>
    import ceph.utils as ceph
  File "lib/ceph/utils.py", line 83, in <module>
    if CompareHostReleases(lsb_release()['DISTRIB_CODENAME']) >= 'eoan':
  File "hooks/charmhelpers/core/strutils.py", line 95, in __init__
    .format(item, self._list))
KeyError: "Item 'focal' is not in list '('lucid', 'maverick', 'natty', 'oneiric', 'precise', 'quantal', 'raring', 'saucy', 'trusty', 'utopic', 'vivid', 'wily', 'xenial', 'yakkety', 'zesty', 'artful', 'bionic', 'cosmic', 'disco', 'eoan')'"

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/705169
Committed: https://git.openstack.org/cgit/openstack/charms.ceph/commit/?id=0434024b2b84e7eea6462ad6f8468827c73defdd
Submitter: Zuul
Branch: master

commit 0434024b2b84e7eea6462ad6f8468827c73defdd
Author: Chris MacNaughton <email address hidden>
Date: Fri Jan 31 08:38:47 2020 +0100

    Fix charms.ceph mocks to not depend on system version

    The charms.ceph utils.py library defines a constant based
    on the running OS version. This change updates where the
    version is read, allowing it to be nicely mocked.

    Change-Id: Ibd65526cad0812f93963bd82619fcd27e055f6f3
    Closes-Bug: #1861659

[OpenStack Infra (hudson-openstack)]

Change abandoned by Chris MacNaughton (icey) (<email address hidden>) on branch: master
Review: https://review.opendev.org/705388
Reason: Failed to merge, resolved elsewhere

[OpenStack Infra (hudson-openstack)]

Change abandoned by Chris MacNaughton (icey) (<email address hidden>) on branch: master
Review: https://review.opendev.org/705389
Reason: Failed to merge and resolved elsewhere