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
* WikiPage is the first caller to use this instead of DIY
* This can be used elsewhere to keep callers uniform
Change-Id: Ia6371eaa185d70d1431271b2c6c955523cd424e8