Bug 1926251

+++ This bug was initially created as a clone of Bug #1883239 +++

octavia-tempest-plugin tests are failing in OSP16.1:

octavia_tempest_plugin.tests.api.v2.test_member.MemberAPITest:
* test_ipv6_UDP_LC_alt_monitor_member_create
* test_ipv6_UDP_RR_alt_monitor_member_create
* test_ipv6_UDP_RR_member_create
* test_ipv6_UDP_SI_alt_monitor_member_create
* test_ipv6_UDP_SI_member_create

with the error:

2020-09-28 07:41:27,192 32619 INFO     [tempest.lib.common.rest_client] Request (MemberAPITest:test_ipv6_UDP_RR_member_create): 200 GET http://10.0.0.136:9876/v2.0/lbaas/pools/0d70a9c2-30ce-47bf-9c4a-a98746e1a51a/members/0a59911e-01d7-4ac9-82fd-762b968648b4 1.949s
2020-09-28 07:41:27,192 32619 DEBUG    [tempest.lib.common.rest_client] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token': '<omitted>'}
        Body: None
    Response - Headers: {'date': 'Mon, 28 Sep 2020 11:41:25 GMT', 'server': 'Apache', 'x-openstack-request-id': 'req-0c4e8f26-f353-4690-a004-dbb3927b0cd5', 'content-length': '588', 'vary': 'Accept-Encoding', 'connection': 'close', 'content-type': 'application/json', 'status': '200', 'content-location': 'http://10.0.0.136:9876/v2.0/lbaas/pools/0d70a9c2-30ce-47bf-9c4a-a98746e1a51a/members/0a59911e-01d7-4ac9-82fd-762b968648b4'}
        Body: b'{"member": {"monitor_port": null, "project_id": "0cb699e390b44409a1f7fd7efe4c3bd4", "name": "tempest-lb_member_member1-create-463936494", "weight": 50, "admin_state_up": true, "subnet_id": "7455bf67-2db8-4854-8af8-27e7b0522d13", "tenant_id": "0cb699e390b44409a1f7fd7efe4c3bd4", "created_at": "2020-09-28T11:40:52", "provisioning_status": "ACTIVE", "monitor_address": null, "updated_at": "2020-09-28T11:41:22", "tags": ["hello", "world"], "address": "2001:db8:0:0:0:0:0:1", "protocol_port": 8112, "backup": false, "id": "0a59911e-01d7-4ac9-82fd-762b968648b4", "operating_status": "ERROR"}}'
2020-09-28 07:41:27,192 32619 INFO     [octavia_tempest_plugin.tests.waiters] show_member's status updated to ACTIVE.
}}}

Traceback (most recent call last):
  File "/home/stack/.virtualenvs/.tempest/lib64/python3.6/site-packages/tempest/lib/decorators.py", line 88, in wrapper
    return f(*func_args, **func_kwargs)
  File "/home/stack/plugins/octavia/octavia_tempest_plugin/tests/api/v2/test_member.py", line 665, in test_ipv6_UDP_RR_member_create
    self._test_member_create(6, pool_id)
  File "/home/stack/plugins/octavia/octavia_tempest_plugin/tests/api/v2/test_member.py", line 925, in _test_member_create
    self.assertEqual(const.NO_MONITOR, member[const.OPERATING_STATUS])
  File "/home/stack/.virtualenvs/.tempest/lib64/python3.6/site-packages/testtools/testcase.py", line 415, in assertEqual
    self.assertThat(observed, matcher, message)
  File "/home/stack/.virtualenvs/.tempest/lib64/python3.6/site-packages/testtools/testcase.py", line 502, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: 'NO_MONITOR' != 'ERROR'


Related fix: https://review.opendev.org/#/c/752872/