Comment 16 for bug 1852221

bionic-train verified with [Test Case] and output is:

ubuntu@hopem-bastion:~/stsstack-bundles/openstack$ juju ssh nova-compute/0 sudo -s
root@juju-dc1c82-lp1852221-train-6:~# apt-cache policy neutron-openvswitch-agent
neutron-openvswitch-agent:
  Installed: 2:15.0.2-0ubuntu1.2~cloud0
  Candidate: 2:15.0.2-0ubuntu1.2~cloud0
  Version table:
 *** 2:15.0.2-0ubuntu1.2~cloud0 500
        500 http://ubuntu-cloud.archive.canonical.com/ubuntu bionic-proposed/train/main amd64 Packages
        100 /var/lib/dpkg/status
     2:12.1.0-0ubuntu1 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
     2:12.0.1-0ubuntu1 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
root@juju-dc1c82-lp1852221-train-6:~# sudo ovs-ofctl -O OpenFlow14 dump-flows br-int| grep -v cookie
OFPST_FLOW reply (OF1.4) (xid=0x2):
root@juju-dc1c82-lp1852221-train-6:~# grep negotiation /var/log/neutron/neutron-*
root@juju-dc1c82-lp1852221-train-6:~#