lots of warnings and stack traces during test runs

[Matthias Runge]

2021-06-30 18:03:22.099833 | ubuntu-bionic | {6} ceilometer.tests.unit.test_event_pipeline.EventPipelineTestCase.test_excluded_event_and_excluded_wildcard_events [0.015559s] ... ok

2021-06-30 18:03:22.114744 | ubuntu-bionic | {6} ceilometer.tests.unit.test_event_pipeline.EventPipelineTestCase.test_name [0.014486s] ... ok

2021-06-30 18:03:22.126340 | ubuntu-bionic | 2021-06-30 18:03:22.124 2036 INFO ceilometer.monasca_client [-] monasca_client: using 127.0.0.1:8080 as Monasca endpoint

2021-06-30 18:03:22.136826 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client [-] Unprocessable Entity (HTTP 422): keystoneauth1.exceptions.http.UnprocessableEntity: Unprocessable Entity (HTTP 422)

2021-06-30 18:03:22.136872 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client Traceback (most recent call last):

2021-06-30 18:03:22.136886 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client File "/home/zuul/src/opendev.org/openstack/ceilometer/ceilometer/monasca_client.py", line 85, in _inner

2021-06-30 18:03:22.136898 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client return func(**kwargs)

2021-06-30 18:03:22.136909 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client File "/usr/lib/python3.6/unittest/mock.py", line 939, in __call__

2021-06-30 18:03:22.136919 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client return _mock_self._mock_call(*args, **kwargs)

2021-06-30 18:03:22.136929 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client File "/usr/lib/python3.6/unittest/mock.py", line 1003, in _mock_call

2021-06-30 18:03:22.136940 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client raise result

2021-06-30 18:03:22.136950 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client keystoneauth1.exceptions.http.UnprocessableEntity: Unprocessable Entity (HTTP 422)

2021-06-30 18:03:22.136960 | ubuntu-bionic | 2021-06-30 18:03:22.126 2036 ERROR ceilometer.monasca_client 

2021-06-30 18:03:22.137413 | ubuntu-bionic | {6} ceilometer.tests.unit.test_monascaclient.TestMonascaClient.test_metrics_create_unprocessable_exception [0.013350s] ... ok