QoS DSCP mark disappear stable/ocata

[Pavlukhin Max]

Environment: Multi-Node Lab DevStack stable/ocata

Steps to introduce:
1) Create QoS policy with dscp mark
2) Apply it to port/network

Summary: there is no dscp mark

Logs (and git diff to show patch): http://paste.openstack.org/show/629451/

Why I didn't upload the patch?
Neutron stable/ocata version has a git repository. I pulled the newest commit, made build and I have this bug (DSCP mark disappear). Then I resolved this issue. But after that I saw the following:

There were two patches to resolve this issue but this changes weren't merged with stable/ocata branch. And there are two opinions of fixing this bug:
1) Keep code in stable/ocata unchanged and don't fix this bug (use delete_flows functions)
https://review.openstack.org/#/c/482569/2/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py
2) Change delete_flow function to uninstall_flows and fix this bug
https://review.openstack.org/#/c/406731/7/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py

By the way in pike and in master we have the second option. I prefer the second too.

[Pavlukhin Max (mpavlukhin)]

Related fix proposed to branch: stable/ocata
Review: https://review.openstack.org/#/c/529315/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ocata
Review: https://review.openstack.org/536095

[Slawek Kaplonski (slaweq)]

As there is no any activity on this bug and Ocata is now in phase III of support (only security bug fixes) I think that we should close this bug.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Bernard Cafarelli (<email address hidden>) on branch: stable/ocata
Review: https://review.openstack.org/536095
Reason: Ocata going EOL, no updates for months, and backport not properly done