Comment 1 for bug 1897326

Based on logs from https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_476/748367/15/check/neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid/47699ad/testr_results.html it seems that this test is just not waiting enough for FIP to be moved to the new server.

FIP was updated at:
2020-09-25 16:24:39.273 97643 INFO tempest.lib.common.rest_client [req-61752930-7315-4d54-8f3d-3f5a83c38580 ] Request (TestFloatingIPUpdate:test_floating_ip_update): 200 PUT http://10.209.97.145:9696/v2.0/floatingips/886230f3-e1ec-4a5d-90f8-350358e649fa 3.935s

And test is waiting 15 seconds for it to be updated. But L3 agent got info about this update at

Sep 25 16:24:59.261691 ubuntu-focal-rax-iad-0020040651 neutron-l3-agent[81604]: DEBUG neutron.agent.l3.router_info [-] Floating IP was moved from fixed IP 10.1.0.11 to 10.1.0.6 {{(pid=81604) process_floating_ip_addresses /opt/stack/neutron/neutron/agent/l3/router_info.py:414}}