Comment 28 for bug 1891673

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

# apt-cache policy neutron-l3-agent
neutron-l3-agent:
  Installed: 2:14.3.0-0ubuntu1~cloud2
  Candidate: 2:14.3.0-0ubuntu1~cloud2
  Version table:
 *** 2:14.3.0-0ubuntu1~cloud2 500
        500 http://ubuntu-cloud.archive.canonical.com/ubuntu bionic-proposed/stein/main amd64 Packages
        100 /var/lib/dpkg/status
     2:12.1.1-0ubuntu1 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

# ./discover_ip_rules_affected_by_lp1891673.sh
Nothing to cleanup - exiting.