BZ#1325861 adds the ability to automatically reschedule load balancers from failed LBaaS agents. This behavior needs to be described as a new procedure in the LBaaS chapter, including how to enable it (allow_automatic_lbaas_agent_failover)
Assigning to Martin for review.
Preparing section based on QE steps: https://bugzilla.redhat.com/attachment.cgi?id=1250611.