Description of problem:

test_extra_dhcp_opts_ipv4_ipv6* failing due to network manager  configured with unsupported format


2021-10-08 10:27:47,034 243921 INFO     [tempest.lib.common.rest_client] Request (ExtraDhcpOptionsTest:_run_cleanups): 404 GET http://10.0.0.105:8774/v2.1/servers/72be9be0-500a-4def-ad2e-7f2f81aea41b 0.080s
2021-10-08 10:27:47,034 243921 DEBUG    [tempest.lib.common.rest_client] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token': '<omitted>'}
        Body: None
    Response - Headers: {'date': 'Fri, 08 Oct 2021 10:27:46 GMT', 'server': 'Apache', 'content-length': '111', 'openstack-api-version': 'compute 2.1', 'x-openstack-nova-api-version': '2.1', 'vary': 'OpenStack-API-Version,X-OpenStack-Nova-API-Version', 'x-openstack-request-id': 'req-ca58901a-0145-4503-96df-413436f793c9', 'x-compute-request-id': 'req-ca58901a-0145-4503-96df-413436f793c9', 'connection': 'close', 'content-type': 'application/json; charset=UTF-8', 'status': '404', 'content-location': 'http://10.0.0.105:8774/v2.1/servers/72be9be0-500a-4def-ad2e-7f2f81aea41b'}
        Body: b'{"itemNotFound": {"code": 404, "message": "Instance 72be9be0-500a-4def-ad2e-7f2f81aea41b could not be found."}}'
}}}

Traceback (most recent call last):
  File "/home/stack/plugins/tempest_neutron_plugin/neutron_plugin/tests/scenario/test_extra_dhcp_opts.py", line 198, in test_extra_dhcp_opts_ipv4_ipv6_stateful
    self._test_extra_dhcp_opts_ipv4_ipv6('dhcpv6-stateful')
  File "/home/stack/plugins/tempest_neutron_plugin/neutron_plugin/tests/scenario/test_extra_dhcp_opts.py", line 162, in _test_extra_dhcp_opts_ipv4_ipv6
    vm_ssh_client, IPV6)
  File "/home/stack/plugins/tempest_neutron_plugin/neutron_plugin/common/utils.py", line 162, in parse_dhcp_options_from_nmcli
    raise exceptions.TimeoutException(message)
tempest.lib.exceptions.TimeoutException: Request timed out
Details: Failed to run nmcli on VM after 20.0 seconds