Since Rocky, Octavia is a valid alternative as LBaaS.
If enabled, we should not configure Neutron LBaaS(v2)
agent at the same time.
The fact that we configure both means neutron-lbaas-agent
will generate messages on rabbitmq which never gets consumed
and creating alarms on NRPE without any actual issues.
This change introduces an option to disable neutron LBaaS
solution. Once activated, it masks lbaas agent service.
Change-Id: I10c4cc2983245efb5bef3d7cbc8e3b6963448a7d
Closes-Bug: #1825906
86eb58317f