Comment 2 for bug 1697533

So the comment above is not related to this bug but it's definitely weird.

I tracked the failure down that test_install_flood_to_tun uses static data to create tunnel which are used also by other tests.

Tunneling port failed to create because it was present in ovsdb from test_add_tunnel_port_ipv4:
http://logs.openstack.org/59/471059/2/check/gate-neutron-dsvm-functional-ubuntu-xenial/cd6149b/logs/dsvm-functional-logs/neutron.tests.functional.agent.test_ovs_lib.OVSBridgeTestCase.test_add_tunnel_port_ipv4_vsctl_.txt.gz

2017-06-09T22:46:05.542Z|10312|tunnel|WARN|port5c4054bf2d5: attempting to add tunnel port with same config as port 'port20c9efa5cd3' (198.51.100.1->192.0.2.1, key=flow, dp port=3, pkt mark=0)
2017-06-09T22:46:05.542Z|10313|ofproto|WARN|test-br1d49c624: could not add port port5c4054bf2d5 (File exists)