Unblock CI by reverting to non-containerized HAProxy

Unblock CI by reverting to non-containerized HAProxy

In change I90253412a5e2cd8e56e74cce3548064c06d022b1 we merged
containerized HAProxy setup, but because of a typo in resource
registry, CI kept using the non-containerized variant and it went
unnoticed that the containerized HAProxy doesn't work yet.

We merged a resource registry fix in
Ibcbacff16c3561b75e29b48270d60b60c1eb1083 and it brought down the CI,
which now used the non-working HAProxy.

After putting in the missing haproxy container image to tripleo-common
in I41c1064bbf5f26c8819de6d241dd0903add1bbaa we got further, but the
CI still fails on HAProxy related problem, so we should revert back to
using non-containerized HAProxy for the time being.

Change-Id: If73bf28288de10812f430619115814494618860f
Closes-Bug: #1697645