Each of these scripts had a class name that was not referenced outside
of the script file itself, and are safe to rename as a result.
Change-Id: Id605aca11db51ee433baeaa998a0e33184c930ca
This is more consistent with LoadBalancer, modern, and inclusive
of master/master mysql, NDB cluster, and MariaDB galera cluster.
The old constant is an alias now.
Change-Id: I0b37299ecb439cc446ffbe8c341365d1eef45849