NeutronNetworkingVRRPTests.test_gateway_failure fails

http://osci:8080/job/zaza_cot_runner/9/console

07:48:03 2020-07-23 07:48:03 [INFO] Shutting down juju-3e55d9-zaza-639531ba6c6b-7
07:48:32 2020-07-23 07:48:32 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:48:51 2020-07-23 07:48:51 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:48:56 2020-07-23 07:48:56 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:49:03 2020-07-23 07:49:03 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:49:14 2020-07-23 07:49:14 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:49:33 2020-07-23 07:49:33 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:50:08 2020-07-23 07:50:08 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:51:12 2020-07-23 07:51:12 [INFO] Attempting to ssh to instance-1(172.17.108.224)
07:51:15 2020-07-23 07:51:15 [INFO] ERROR
07:51:15 2020-07-23 07:51:15 [INFO] ======================================================================
07:51:15 2020-07-23 07:51:15 [INFO] ERROR: test_gateway_failure (zaza.openstack.charm_tests.neutron.tests.NeutronNetworkingVRRPTests)
07:51:15 2020-07-23 07:51:15 [INFO] Validate networking in the case of a gateway failure.