HAproxy / LB updates for RHEL8

[oybed]

What does this PR do?

Updated to work with RHEL8 + bring in keepalived as part of the deployments.

How should this be tested?

Deploy HAproxy and Keepalived on a pair of hosts

Is there a relevant Issue open for this?

N/A

Other Relevant info, PRs, etc.

N/A

People to notify

cc: @redhat-cop/infra-ansible