Comment 10 for bug 1826419

As discussed at the Neutron L3 meeting last week, it was agreed that the current behaviour is not compliant with either of the two original specs related to Internal DNS and external DNS integration and that the behaviour change would be reverts in master and back to stable/{queens,rocky,stein} branches.

I have the master branch up for review with an associated revert in neutron-tempest-plugin and have stable branch updates prepared but not yet up for review (just waiting for master branch to complete testing and I'll put them all up).