make sure HA SCALE accounts for IPv6

I've added IPv6 support on SCALE HA systems, however, testing has showed that keepalived.conf cannot mix and match IPv4/IPv6 in the same vrrp_instance sections in the config file. They must have separate entries.

i.e
vrrp_instance eth0_v4 { blah }
vrrp_instance eth0_v6 { blah }

Furthermore, the vrrp event that's generated is designed in such a way that the interface name maps to the interafce id in the database but I've had to change that in keepalived.conf so this will need to be accounted for as well.