Comment 6 for bug 1639025

Original upstream bug #1522980 is about general issue: it states that HA with l2pop is provided only if control plane is operational. Original bug's reporter says that we shouldn't rely on database, messaging server and neutron-server reliability when providing HA.

Upstream developers used 3 patches to solve reported issue:

1. https://review.openstack.org/#/c/255237/ is used to implement additional method to create flood flaws (not it can be done not only with l2pop) and to change the way neutron-server, DB and messenger are used to organize HA.
2. Patches https://review.openstack.org/#/c/323993/ and https://review.openstack.org/#/c/339982/ are used to rename existing functions and DB tables, but don't change any neutron's behaviour. No need to backport.

I have analyzed changes made in the first patch and it looks like they change neutron internal processes significantly. On the other hand, the overall request looks like a feature to me (we improve existing neutron's features). Since we have no reliable tests to cover all the variety of possible issues this patch can introduce, I think that this bug should be closed as Won't Fix for 8.0-updates.