Also makes check-logs clear the aggregate files
to prevent duplicates due to upgrade and post.

Change-Id: I72377b6ac48e29dc5e24d1e3bd343e87b74a7a71

VXLAN is necessary to run HA in CI (due to floating VIP
address handled by keepalived).
It also turned out to be required to have private
IPv6 address assignments.
This patch is based on linux bridge rather than OVS
to avoid problems with OVS deployed in containers.

This patch enables haproxy in multinode jobs.

Includes saving of linux networking details.

Makes DASHBOARD_URL agree with OS_AUTH_URL - properly uses the
pre-upgrade value for testing.

Co-authored-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>
Depends-on: https://review.opendev.org/683068
Depends-on: https://review.opendev.org/682957
Change-Id: I66888712da80c3d6f84ee4949762961664d3adea

Change-Id: I01e58d3548d6adc4a2d6f1088773df7941da3865

If the main CI job fails before generating an ARA report, the SQLite
database file will not exist. This cases the job to fail with
POST_FAILURE, rather than FAILURE, and the following is seen in the
logs:

rsync: change_dir "/home/zuul/.ara" failed: No such file or directory
rsync error: some files/attrs were not transferred (see previous errors)
(code 23) at main.c(1655) [Receiver=3.1.1]
rsync: [Receiver] write error: Broken pipe (32)

This change fixes this by checking for an SQLite database file, and only
intiating the rsync transfer if it exists.

Change-Id: I370e5bc9f137abe552918a3215a025fa61e3a0ca

More info please check[0][1].

[0] http://lists.openstack.org/pipermail/openstack-dev/2018-March/128902.html
[1] https://ara.readthedocs.io/en/latest/advanced.html

Change-Id: I5cf68c0bb54878e328387143712dec9582be04a1

Change-Id: Ifdf2ede2cb5f057d1d1f02bfa00ee05872e94b9f

Another step to migrate to new CI

Change-Id: Id9bf9b4b1114f5be66f6c028a0db16d869efeceb
Depends-On: Iaacdca31b27b7033ec08499bcea7061b9d3ec279

Change-Id: Id71c1ecda9f8647a0eb290fe02a12afb3df09988

Partial-Bug: #1720601
Change-Id: Ibc20a6ae8c645ff82f3c14a6286073dffd4cfae2