Comment 2 for bug 1563820

Reproduced on:
[root@fuel ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 155
cat /etc/fuel_build_number:
 155
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-misc-9.0.0-1.mos8259.noarch
 python-fuelclient-9.0.0-1.mos301.noarch
 fuel-9.0.0-1.mos6325.noarch
 fuel-provisioning-scripts-9.0.0-1.mos8611.noarch
 fuelmenu-9.0.0-1.mos263.noarch
 fuel-ui-9.0.0-1.mos2641.noarch
 fuel-migrate-9.0.0-1.mos8259.noarch
 fuel-ostf-9.0.0-1.mos921.noarch
 shotgun-9.0.0-1.mos87.noarch
 python-packetary-9.0.0-1.mos130.noarch
 fuel-bootstrap-cli-9.0.0-1.mos272.noarch
 fuel-nailgun-9.0.0-1.mos8611.noarch
 fuel-setup-9.0.0-1.mos6325.noarch
 rubygem-astute-9.0.0-1.mos733.noarch
 fuel-mirror-9.0.0-1.mos130.noarch
 fuel-openstack-metadata-9.0.0-1.mos8611.noarch
 fuel-notify-9.0.0-1.mos8259.noarch
 fuel-release-9.0.0-1.mos6325.noarch
 nailgun-mcagents-9.0.0-1.mos733.noarch
 network-checker-9.0.0-1.mos72.x86_64
 fuel-utils-9.0.0-1.mos8259.noarch
 fuel-library9.0-9.0.0-1.mos8259.noarch
 fuel-agent-9.0.0-1.mos272.noarch

qos extension wasn't added to extensions list in sriov_agent.ini and due to that qos code wasn't invoked.

Modifying the [agent] section of sriov_agent.ini in the following way fixed the problem.
[agent]

#
# From neutron.ml2.sriov.agent
#

# Extensions list to use (list value)
extensions = qos