This patch adds tests for neutron and designate DNS
integration.

Tests are based on scenarios described below in [1][2].

[1] https://docs.openstack.org/neutron/latest/admin/config-dns-int.html
[2] https://docs.openstack.org/neutron/latest/admin/config-dns-int-ext-serv.html

Change-Id: I3953f760458285e5c9a818599492c6176e857dde

bashate 2.1.1 now also verifies the indentation of comments, so watch
out.

Change-Id: Ia423d8e96884cf1f5a1edbf768ad3202af4bdc86

This avoids polluting the module path for other deployed projects,
like Tenks.

Change-Id: I17802f628e1e7db8d1f5caaa815170a8415e995c

Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/755589


Co-Authored-By: wu.chunyang <wuchunyang@yovole.com>

Change-Id: I489c1ca23d8abc350d3204ecc167d5d93bbbd1d9

Add trove smoke test.

Change-Id: I571d9663bcadb1ddc5a7ad86a2c478706e0705a9

Follows designate guide, adding a default zone for fixed and
floating IPs, then boots an instance and verifies that its
name resolves.

Change-Id: Ifbfdab425e2c8a36a8f3ab8539f70dca4cce2abc

Adds a new Zuul job, kolla-ansible-centos8-source-magnum, for testing
deployment of Magnum, Octavia and associated services.

Change-Id: I61b293ba6bb52064ea98a73e2dff0023fa01a2a2